Momentum (AQA A-Level Physics): Quizzes

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Momentum
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What is the formula for momentum?

mass×velocity\text{mass} \times \text{velocity}

When is momentum always conserved?

When no external forces are present

A 500 kg500\text{ kg} car moves at 4 m/s4\text{ m/s}. What is its momentum in kg m/s\text{kg m/s}?

20002000

A 500 kg500\text{ kg} car at 4 m/s4\text{ m/s} hits a stationary 1500 kg1500\text{ kg} truck. They join. Find VV in m/s.

11

What does impulse (FΔtF \Delta t) represent?

Change in momentum

A bat hits a ball with 100 N100\text{ N} for 0.5 s0.5\text{ s}. Find change in momentum in kg m/s.

5050

What does the area under a force-time graph equal?

Change in momentum

Why do crumple zones reduce injury risk?

They increase impact time

In elastic collisions, which quantities are conserved?

Both momentum and kinetic energy

Why is an explosion considered an inelastic collision?

KE after is greater than before

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