Gravity (GCSE Physics)

A satellite in low Earth orbit stays in orbit because:

Why does the gravitational potential energy of an object at height h depend on the choice of reference level (zero height)?

A 10 kg object is in free fall for 2.0 s near Earth (g = 9.8 N/kg). What is its approximate speed after 2.0 s?

A person of mass 60 kg climbs a 12 m high ladder. What increase in their gravitational potential energy occurs? (g = 9.8 N/kg)

A skydiver jumps from a plane and initially accelerates towards Earth. Later the skydiver reaches terminal velocity. Which statement about terminal velocity is correct?

Which formula gives the gravitational force between two point masses m1 and m2 separated by distance r (Newton’s law of universal gravitation)?

A stone is dropped from rest in a vacuum close to Earth. Which graph best shows its velocity-time behaviour (qualitative)?

A 0.20 kg object is swung on a string in a horizontal circle of radius 0.50 m at constant speed 4.0 m/s. What is the magnitude of the centripetal force provided by tension? (F = m v^2 / r)

Which factor does NOT affect the gravitational force between two objects?

A ball rolls off a horizontal table and lands 1.5 m from the table base. If the table height is doubled, neglecting air resistance, the horizontal distance it lands will be:

Which equation gives the change in gravitational potential energy when an object of mass m is lifted through height h in a uniform gravitational field g?