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 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 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 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 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 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 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 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 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 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 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 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.
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)