Momentum And Its Conservation
State the SI unit of linear momentum.
A car of mass 1200 kg travels at 15 m s⁻¹. Calculate the magnitude of its linear momentum.
A bullet of mass 8.0 g leaves a rifle barrel travelling at 720 km h⁻¹. Calculate the magnitude of its momentum.
A trolley’s mass and velocity are both doubled. Describe what happens to its momentum.
Which statement correctly expresses the principle of conservation of linear momentum?
Which definition correctly describes a closed system in the context of momentum conservation?
A 2.0 kg trolley moving right at 3.0 m s⁻¹ collides with a stationary 1.0 kg trolley. The two trolleys stick together after the collision. Calculate their common velocity.
A rifle of mass 4.0 kg fires a bullet of mass 0.020 kg with a muzzle velocity of 300 m s⁻¹. Calculate the recoil velocity of the rifle.
Newton’s second law in momentum form states that the resultant force on a body is equal to:
The conservation of linear momentum can be derived by combining Newton’s second law with which other principle?
A trolley is calculated to have a final momentum of −0.50 kg m s⁻¹, with rightward chosen as positive. State what this result means.
Which statement correctly compares momentum and kinetic energy in a perfectly inelastic collision?
A lorry of mass 8000 kg travels at 3.0 m s⁻¹. Determine the velocity at which a 1200 kg car would carry the same momentum.
A stationary firework of mass 0.80 kg explodes into two fragments. A 0.30 kg fragment moves east at 12 m s⁻¹. Calculate the velocity of the remaining fragment.
An astronaut floating at rest in deep space throws a heavy tool away from herself. Predict what happens to the astronaut immediately after releasing the tool.