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QUESTION 1 Which of the diagrams correctly represents the forces acting on an object resting on an inclined plane? (A) (B) ©) (D)
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 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 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 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 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 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 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 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 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 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)
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