Physics · May / June 2019 · Paper 12 · Question 5

Four of the gravitational forces that act between bodies in the Solar System are listed below. P the force on the Moon due to the Earth Q the force on the Earth due to the Sun R the force on the Earth due to the Moon S the force on the Moon due to the Sun Which two forces are a Newton’s third law pair (action and reaction)?

1. AP and Q
2. BP and R
3. CQ and S
4. DR and S

As printed in the paper