view_agenda
Questions
Find the perfect question by filtering through every previous QCAA Physics external exam question
notifications
Question Classifications
We’re conducting a final review of the classifications and formatting for our recently onboarded questions. If you have any feedback, please share it with us here.
QUESTION 1 Which of the diagrams correctly represents the forces acting on an object resting on an inclined plane? (A) (B) ©) (D)
QUESTION 2 The definition of average speed is the rate of change of (A) velocity. (B) distance. (C) acceleration. (D) displacement.
QUESTION 3 The diagram shows two vectors. Vector A: 12 km to the east Vector B: 9 km to the south _ Calculate the magnitude of the resultant vector when Vector A is added to Vector B. (A) 15km (B) 16.5 km (C) 21 km (D) 108 km
QUESTION 8 An object 46 m above the ground is projected horizontally with an initial velocity of 25 m s7L Calculate the horizontal displacement of the object at the time it reaches the ground. (A) 77m (B) 120m (©) 190m (D) 240m
QUESTION 11 The diagram shows object A and object B being projected at different velocities. Which of the following statements is true? (A) Object A has a shorter flight time than object B. (B) Object A has a smaller maximum height than object B. (C) Object A has a larger horizontal velocity than object B. (D) Object A has a smaller horizontal displacement than object B.
QUESTION 12 Which of the following is one of Keplers laws of planetary motion? (A) (B) ©) (D) The laws of physics are the same in all inertial frames of reference. All planets move about the Sun in elliptical orbits having the Sun as one of the foci. The speed of light in a vacuum has the same value c in all inertial frames of reference. The force of attraction between each pair of point particles is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
QUESTION 15 Calculate the orbital period of a satellite travelling on a 3.00 X 10® m radius orbit around the Earth. (A) 1.44 x 102 hours (B) 4.54 x 10? hours (C) 1.64 x 10° hours (D) 7.44 x 10% hours
QUESTION 18 Calculate the initial vertical velocity of a projectile with an initial velocity of 68 m s 'atan angle of 51° up from the horizontal. (A) 43ms! (B) 51ms! (C) 53ms! (D) 68ms !
QUESTION 21 (3 marks) An object that is 7.12 x 10° m from the centre of the Earth experiences a gravitational force of 2.84 kN. Calculate the mass of the object. kg (to the nearest whole number)
QUESTION 25 (3 marks) Mars has an average orbital radius of approximately 1.5 times the average orbital radius of Earth. Calculate the time it takes Mars to orbit the Sun. days (to the nearest whole number)
QUESTION 6 (4 marks) The diagram shows a particle Q entering a uniform magnetic field of 0.090 T. The particle has a speed of 1.5 x 10°m s!. Once in the magnetic field the particle moves in a circular path as shown. O e __________________ B=0.090T It is suspected that Q 1s one of the particles listed in the table. Particle number | Charge g (C) Mass m (kg) Determine which particle Q is most likely to be.
QUESTION 8 (4 marks) The diagram shows an object sliding down a frictionless inclined plane. sy [~ Not drawn to scale The graph shows the velocity of the object measured at various times. 35 30 T 25 g > 20 2 § 15 10 5 5 0 0 1 2 3 4 Time (s) Determine the angle of incline 6. of the inclined plane. Show your working. N
QUESTION 9 (5 marks) Nine planets orbit the same star. The orbital radius and orbital period of each planet was measured. The graph shows the cube of the orbital radius of each planet compared to its orbital period squared T 2 18 ek AN Orbital radius cubed 7* (10°? m?) 0 10 000 20 000 30 000 40 000 50 000 60 000 70 000 Orbital period squared 72 (days?) Determine the mass of the star. Show your working. kg (to 1 decimal place)
QUESTION 2 Calculate the initial horizontal velocity of a projectile with an initial velocity of 38 m s!atan angle of 42° up from the horizontal. (A) 25ms (B) 28m g1 (C) 34ms! (D) 40ms!
QUESTION 7 Normal force is the force acting along an imaginary line (A) parallel to the surface. (B) perpendicular to the surface. (C) opposite to the gravitational force. (D) 1n the same direction as the gravitational force.
QUESTION 8 The diagram shows two displacement vectors. Vector A Vector B s=20m Calculate the resultant vector above the horizontal axis when Vector A is added to Vector B. (A) 43.6m at 36.6° (B) 43.6m at 53.4° (C) 48.4mat 18.1° (D) 48.4 m at 71.9°
QUESTION 11 Uniform circular motion occurs when an object is travelling in a circle at a constant (A) speed due to a force of constant magnitude acting in a parallel direction to its velocity. (B) wvelocity due to a force of constant magnitude acting in a parallel direction to its speed. (C) speed due to a force of constant magnitude acting in a perpendicular direction to its velocity. (D) wvelocity due to a force of constant magnitude acting in a perpendicular direction to its speed.
QUESTION 12 Calculate the maximum height reached by a projectile with an initial velocity of 15 m s'atan angle of 30° up from the horizontal. (A) 2.87m (B) 3.83m (C) 8.6l m (D) 11.5m
QUESTION 13 Calculate the orbital period of a satellite travelling around the Earth with a radius of 4.00 X 10% m. (A) 3.49 x 1072 hours (B) 3.94 x 10% hours (C) 6.99 x 10% hours (D) 1.76 x 10° hours
QUESTION 16 The weight of a 5 kg object on Earth is (A) 049N (B) 051N (C) 49N (D) 51N
QUESTION 18 A gravitational field is the (A) net gravitational force per unit mass at a particular point in space. (B) energy stored in an object as a result of its position relative to another object. (C) region of space surrounding a body in which another body experiences a force of gravitational attraction. (D) position in space where objects experience a force or acquire potential energy as they are worked into that position.
QUESTION 22 (3 marks) A planet is orbiting a 3.38 x 10! kg star. The radius of the orbit is 4.23 x 10% km. Calculate the average speed of the planet. Average speed = ms ' (to the nearest whole number)
QUESTION 23 (5 marks) The diagram shows a metal rod with a mass of 10.0 g and a length of 8.0 cm suspended in a uniform magnetic field of 0.50 T. There is no electric current through the metal rod when it is in Position 1. DC to power supply DC from power supply .'/ K\ Position 1 A;n Not to scale When a current (/) is passed through the metal rod it moves to Position 2 with an angle of 40° to the vertical. DC to power supply DC from power supply Position 2 Not to scale Determine the magnitude of the current required to move the metal rod into Position 2. Current = A (to 1 decimal place)
QUESTION 24 (3 marks) The diagram shows a 1.5 kg object on an inclined plane with an angle of 30° up from the horizontal. The object experiences a frictional force of 4.5 N. e Not to scale Calculate the magnitude of the net force acting on the object. Magnitude of net force = N (to 1 decimal place)
QUESTION 25 (4 marks) The graph shows the centripetal forces required to keep objects with different mass in uniform circular motion with a constant speed and constant radius of 20 cm. 7 Centripetal force (N) 0 0.05 0.10 0.15 0.20 0.25 Object mass (kg) Determine the speed of the objects.
QUESTION 3 (3 marks) An object undergoes uniform circular motion in a path with a radius of 7. Determine the effect on the radius if the mass of the object is doubled but the centripetal force and velocity remain unchanged.
QUESTION 4 (4 marks) A spacecraft is located between two large asteroids Asteroid A and Asteroid B that are 120 km apart. Asteroid As mass is approximately four times the mass of Asteroid B. Determine the distance of the spacecraft from Asteroid B if it experiences no net gravitational force from the two asteroids. Distance from Asteroid B = km (to the nearest whole number)
QUESTION 5 (4 marks) An alpha particle with a charge of +3.2 X 107 C moves through an electric field accelerating from rest through a potential difference of 240 V. Determine the velocity of the particle at the end of its acceleration expressing your answer in scientific notation. Velocity = ms (to 2 significant figures)
QUESTION 7 (6 marks) An object on a planet is launched horizontally from a cliff. Its vertical displacement is measured over 6 seconds. The graph shows the objects vertical displacement with respect to time squared. 100 90 80 70 60 50 40 30 Vertical displacement of object (m) 20 10 0 5 10 15 20 25 30 35 40 Time squared (sz) a) Determine the mathematical relationship between vertical displacement (s) and time (7). [3 marks] b) Calculate the acceleration due to gravity on the planet. [3 marks] Acceleration = ms > (to 2 significant figures)
QUESTION 3 Which free body diagram best represents an object being pulled at a constant speed up an inclined plane? (A) Fx (B) Fx Fr Fr Fy F¢ F F ©) Fx (D) Fx F¢ Fr F{ Fy F F
QUESTION 4 An object orbiting Earth has an orbital period of 5.6 x 10° s. What is the objects orbital radius? (A) 3.8x10°m (B) 6.8x10°m (C) 1.8%x10%m (D) 1.3x10%m
QUESTION 9 Which diagram would result in the furthest horizontal distance travelled? (A) (B) ©) (D) Not to scale
QUESTION 12 An object experiencing uniform circular motion in a horizontal plane travels at an average speed of 8.0 m s Calculate the radius of the objects path if it takes 0.3 s to complete a full rotation. (A) 3.8x10'm (B) 2.6x10°m (C) 1.5x10'm (D) 1.7x10*m
QUESTION 16 Two vectors are shown. Which option represents the resultant vector of X + ¥? (A) (B) (© (D) Not to scale
QUESTION 17 An object is in orbit 400 km above the surface of the Earth. The Earth has a radius of 6.4 x 10° m. What is the magnitude of the gravitational field strength experienced by the object? (A) 8.6x10°ms (B) 9.7x10°m s (C) 2.5x10°ms2 (D) 5.9x 10 ms2
QUESTION 27 (5 marks) Object A is five times the mass of object B. The graph shows the contribution of each object towards the strength of the net gravitational field between them. e p 0.01 0.001 Gravitational field strength (m s_z) 0.0001 0.00001 0 10 20 30 40 Distance from the centre of A (107 m) Determine the total distance between the centre of the two objects. Show your working. Total distance = m (to two significant figures)
QUESTION 28 (7 marks) An object of mass 200 g moves in a uniform circular path with a radius of 25 cm. The time taken for 10 revolutions 1s 3.0 s. a) Calculate the distance travelled by the object after 3.9 s. Show your working. [2 marks] Distance = m (to two significant figures) b) Calculate the centripetal force acting on the object. Show your working. [5 marks] Centripetal force = N (to two significant figures)
QUESTION 3 (8 marks) Negatively charged oil drops were placed in a uniform electric field generated by two parallel plates. By altering the applied voltage between the plates the oil drops were suspended in the air between the plates. Not to scale The graph shows the electric field strength required (achieved by altering the applied voltage) to suspend negatively charged oil drops of varying weight. 3.5 ' ' T R 3.0 2.5 2.0 1.5 1.0 Electrical field strength (1019 Vv m_l) 0.5 0 10 20 30 40 50 60 Oil drop weight (N) a) Determine the average charge on the oil drops. Show your working. [4 marks] Average charge = C (to two significant figures) Another oil drop was suspended between the plates with an electric field strength of 2.0 x 10 vm b) Determine the work done to move this oil drop a distance of 5 mm towards the negatively charged plate. Show your working. [4 marks]
QUESTION 4 (5 marks) A stationary object on a frictionless inclined plane is connected to a 15 kg weight as shown. Not to scale Calculate the mass of the object on the inclined plane. Mass = kg (to two significant figures)
QUESTION 6 (14 marks) A light was shone onto a metallic surface and the subsequently released photoelectron passed through a magnetic field. Magnetic field going into the page Light source / 7 / / / Metal surface 77 a) Identify the direction the photoelectron would have curved as it passed through the changed. magnetic field. [1 mark] The graph shows the maximum kinetic energy of the photoelectron as the frequency of the light was 1.4 1.2 ____________________________________________________________________________________________________________________________ _._____________ 1.0 b) c) 0.8 0.6 0.4 Maximum kinetic energy (eV) 0.2 OO i : | ' | 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.3 2.6 1/4 (10°m) Determine the work function for the metal. Show your working. [4 marks] Work function = J (to two significant figures) If the strength of the magnetic field is 5 uT determine the maximum radius of the photoelectrons path through the magnetic field when light of wavelength 450 nm was shone onto the metallic surface. Show your working. [9 marks] Radius = m (to two significant figures)
QUESTION 7 (3 marks) Two asteroids experience a gravitational force of 3.3 x 10° N between them. Their masses are 2.7 x 10 kg and 6.1 x 10 kg. Calculate the distance between the two asteroids. Show your working. Distance = m (to two significant figures)
QUESTION 8 (4 marks) The graph shows the gravitational force experienced by a rocket of mass 750 kg as it approaches an asteroid. 30 N N N e _ () D Gravitational force on rocket (N) 9 0 5 10 15 20 25 30 35 40 45 50 17 (1073 m Determine the mass of the asteroid. Show your working.
QUESTION 9 (9 marks) A person spins an object 4.3 m above the ground in a horizontal circular path of radius 0.8 m. They release the object horizontally allowing it to travel to the ground. a) Calculate the centripetal acceleration of the object before it is released given it takes 5 s for the object to complete 12 revolutions. Show your working. [4 marks] Centripetal acceleration = ms 2 (to two significant figures) b) Calculate the total horizontal displacement for the object after it is released. Show your working. [5 marks] Total horizontal displacement = m (to two significant figures)
QUESTION 2 The weight of an object on Earth is 550 N. The mass of the object is approximately (A) 56kg. (B) 56kg. (C) 5400 kg. (D) 5400 kg.
QUESTION 6 Select the words that correctly complete the description of uniform circular motion. The motion of an object travelling at a in a circle due to a force acting on the object in a direction to the velocity of the object. (A) varied speed parallel (B) varied acceleration parallel (C) constant speed perpendicular (D) constant velocity perpendicular
QUESTION 13 Calculate the resulting radius of circular motion when a 150 g mass travelling at 3.0 m s experiences a centripetal force of 15 N. (A) 3.0cm (B) 90cm (C©) 1lcm (D) 20cm
QUESTION 15 Calculate the gravitational field strength at a distance of 3.63 x 10®* m from the centre of the Earth. (A) 496 x102 ms (B) 1.80x 10 ms (C) 3.02x10°ms (D) 1.10 x 10°m s72
QUESTION 19 . 2 . . Select the two formulas that along with v = g can be used to derive Keplers third law of planetary motion. F (A) Fgmgandg; (B) F = GMm 2 <) a.= UT and F o = e GMm mu? (D) F= rand Foet =
QUESTION 22 (3 marks) A projectile has an initial velocity of 12 m s at an angle of 35° above the horizontal. Calculate the vertical component of the projectiles initial velocity. Show your working. Velocity = m s~ (to 1 decimal place)
QUESTION 23 (3 marks) A 5 kg object 1s experiencing a centripetal force of 80 N and is moving in uniform circular motion with a speed of 8 m s'. Calculate the radius of the circular path. Show your working. Radius = m (to the nearest whole number)
QUESTION 25 (4 marks) The diagram below shows a moving charged particle in a magnetic field. X X X X X X X X B=0.02T X X X X X Calculate the mass of the charged particle using the information provided in the diagram above. Show your working. Express the solution using scientific notation. Mass = kg (to 1 decimal place)
QUESTION 27 (3 marks) Object A has an initial horizontal velocity of 4 m s Calculate the angle at which Object B needs to be projected if it has an initial speed of 17 m s but the same initial horizontal velocity as Object A. Show your working.
QUESTION 28 (6 marks) The diagram below shows an object initially at rest on a frictionless inclined plane. < 1 Calculate the time it will take for the object to slide 10 m along the slope. Show your working. Time = s (to the nearest whole number)
QUESTION 1 (5 marks) Two objects each with a mass of 2.5 x 107 kg are separated by a distance 7 m m The gravitational force (F) between the two objects was measured at various distances (r). The data is plotted in the graph below. Gravitational force vs. the inverse square of the distance F (X 1078 N) 0 0.002 0.004 0.006 0.008 0.01 0.012 r2(m?) a) Identify the mathematical relationship represented by the linear trendline in the graph on page 2. Show your working. [3 marks] b) Use the information provided and the mathematical relationship between F and r identified in 1a) to determine an experimental value for the gravitational constant G. Show your working. Express the solution using scientific notation. [2 marks] Experimental valueforG=__ = Nm?kg? (to 1 decimal place)
QUESTION 3 (8 marks) The diagram below shows two forces acting upon an object. This diagram is not to scale. Calculate the resultant force acting upon the object and the direction of acceleration. Show your working. Force = N (to the nearest whole number) Direction = (to 1 decimal place)
QUESTION 7 (6 marks) The diagram below shows two projectile motion scenarios Object A and Object B. Object A is released from an unknown height above the ground. It takes 4.20 seconds to reach the ground. At the same instance that Object A is released Object B is projected at an angle of 30.0° from the horizontal. Calculate the horizontal displacement of Object B given that it lands at the same time as Object A. Show your working. Horizontal displacement=____ m (to the nearest whole number)
QUESTION 4 Kepler’s third law (A) describes the elliptical orbit of planets. (B) combines Newton’s first law of motion with uniform circular motion. (C) equates the area of the arc sweep of a planet to the time taken to complete it. (D) describes the relationship between uniform circular motion and the Law of Universal Gravitation.
QUESTION 6 An object of mass 6.0.x 107 kg travels along a path as shown. The object takes 25 seconds to complete the semicircular section of the path. Yoo _ # aN 7 \ / \ 7 \ < ra 160m | / } Yo / 7 / s fo Z 7 Va Not to scale a Calculate the centripetal force experienced by the object as it moves from Y to Z. (A) 3.0x10°N (B) 7.6x107N (C) 3.8x10°N (D) 7.6x10'N
QUESTION 15 Two objects experience a gravitational force F between them. Calculate the magnitude of the force acting between the two objects if the distance between them was doubled and the mass of one object was doubled. 1 (A) red 1 (B) 5 (C) 1F (D) 2F
QUESTION 18 A 20 kg object is placed on an inclined plane with a slope of 35°. If the object experiences a frictional force of 40 N and no additional applied force calculate its acceleration down the inclined plane. (A) 3.6ms~ (B) 5.6ms~ (C) 6.0ms~ (D) 7.6ms~
QUESTION 22 (3 marks) Particles move at a rate of 1.3x10° times per second around a circular particle accelerator with a radius of 35 m. Calculate the average speed of the particles. Show your working. Average speed = ms! (to two significant figures)
QUESTION 27 (5 marks) A satellite orbits a planet of mass 6.42 x 107° kg at a height of 5000 km from the surface. The planet has a diameter of 6780 km. Determine the speed required for the satellite to maintain its orbit. Show your working. Speed = ms! (to two significant figures)
QUESTION 2 (5 marks) In a frictionless system object A rests on an inclined plane and object B undergoes horizontal circular motion. The two objects are connected by a length of string as shown. Not to scale Determine the speed of object B needed for object A to remain stationary. Show your working. ms! (to two significant figures)
QUESTION 4 (3 marks) Two objects on different planets experience different accelerations due to gravity. Mass (kg) | Acceleration due to gravity (m 5) Ea Determine which object has the greatest force acting on it. Show your working.
QUESTION 6 (10 marks) A ball is thrown with an initial velocity of 8.0 m s! into a bucket as shown. 3.0m 1.8m Not to scale a) Calculate the time taken for the ball to reach its maximum height. Show your working. [4 marks] Ss (to two significant figures) b) Calculate the magnitude of the ball’s final velocity when it enters the bucket. Show your working. [6 marks] Final velocity = ms! (to two significant figures)
No results found
open_with
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_1.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_2.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_3.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_4.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_5.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_6.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_7.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_8.webp)