A ball of mass 0.5kg is thrown against a wall at a speed of 12ms⁻¹. It bounces back with a speed of 8 ms⁻¹. The collision lasts for 0.10s. [Figure showing ball approaching and rebounding from wall] What is the average force on the ball due to the collision?

A skydiver, who is falling vertically through the air, opens his parachute. Which row describes the velocity of the s…

A rock of mass 2m, travelling in deep space at velocity v, explodes into two parts of equal mass, one of which is the…

An object of fixed mass is initially at rest at point P. The object then moves away from point P with uniform acceler…

A distant star is receding from the Earth with a speed of 1.40 × 10⁷ m s⁻¹. It emits light of frequency 4.57 × 10¹⁴ H…

Diffraction is a term used to describe one aspect of wave behaviour. What does diffraction make possible?

Monochromatic light of wavelength 5.30 × 10⁻⁷ m is incident normally on a diffraction grating. The first order maximu…