WACE ATAR Physics Practice Questions - WACE Year 12 ATAR Physics (Units 3 & 4) Exam - WACE ATAR Physics Practice Questions - WACE Year 12 ATAR Physics (Units 3 & 4) Exam

Question 1

According to Newton's Law of Universal Gravitation, what happens to the gravitational force between two point masses if the distance between their centres is doubled?

The gravitational force increases by a factor of 4. The gravitational force decreases to one-half of its original value. The gravitational force decreases to one-quarter of its original value. The gravitational force remains unchanged.

Correct Answer:

The gravitational force decreases to one-quarter of its original value.

Question 2

What is the gravitational field strength at the surface of a planet with mass 4.0 × 10^24 kg and radius 5.0 × 10^6 m? (G = 6.67 × 10^-11 N m^2 kg^-2)

5.34 N kg^-1 10.67 N kg^-1 53.36 N kg^-1 1.07 N kg^-1

Correct Answer:

10.67 N kg^-1

Question 3

A satellite orbits Earth in a stable circular orbit. Which expression gives the orbital speed v of the satellite at distance r from Earth's centre of mass M?

v = sqrt(G * M * r) v = sqrt(G * M / r) v = G * M / r^2 v = 2 * pi * r / G

Correct Answer:

v = sqrt(G * M / r)

Question 4

Kepler's Third Law states that for planets or satellites orbiting a central mass M, the ratio T^2 / r^3 is constant. What is the value of this constant equal to?

4 * pi^2 / (G * M) G * M / (4 * pi^2) 2 * pi / (G * M) sqrt(G * M)

Correct Answer:

4 * pi^2 / (G * M)

Question 5

Two positive charges of 3.0 µC and 6.0 µC are separated by a distance of 0.30 m in a vacuum. What is the magnitude of the electrostatic force between them? (k = 8.99 × 10^9 N m^2 C^-2)

1.80 N 0.54 N 1.80 × 10^-3 N 5.39 N

Correct Answer:

1.80 N

Question 1

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Prepare with the WACE ATAR Physics Practice Questions - WACE Year 12 ATAR Physics (Units 3 & 4) Exam practice quiz. This question bank includes 100 questions covering field, magnetic, coil, earth, and uniform. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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WACE ATAR Physics Practice Questions - WACE Year 12 ATAR Physics (Units 3 & 4) Exam

This practice set contains 100 questions from the matching question bank and focuses on field, magnetic, coil, earth, and uniform. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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WACE ATAR Physics Practice Questions - WACE Year 12 ATAR Physics (Units 3 & 4) Exam

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