A ball of mass 2.0 kg travels horizontally with a speed of 4.0 ms⁻¹. The ball collides with a wall and rebounds in the opposite direction with a speed of 2.8 ms⁻¹. The time of the collision is 150 ms. What is the average force exerted on the wall?

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…

What is the definition of force?

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…

The electric field strength at a certain distance from an isolated alpha particle is 3.0 × 10⁷ N C⁻¹. What is the for…