Gravitational Fields · Paper 1 — Free Physics SL Practice Questions

A $70.0\text{ kg}$ astronaut stands on the surface of Mars, where the gravitational field strength is $3.71\text{ N kg}^{-1}$. What is the gravitational force exerted on the astronaut by Mars?

A satellite of mass $500 \text{ kg}$ orbits Earth at an altitude where the gravitational field strength is $8.2 \text{ N kg}^{-1}$. What is the gravitational force acting on the satellite?

A rock of mass $2.0 \text{ kg}$ is released from rest near the surface of the Moon, where the gravitational field strength is $1.6 \text{ N kg}^{-1}$. What is the gravitational force acting on the rock?

Two identical spheres, each of mass $M$, are placed with their centres a distance $d$ apart, and the gravitational force between them is $F$. One sphere is moved so that the separation of the centres becomes $3d$, while the masses remain unchanged. What is the gravitational force between the spheres?