Momentum

Momentum Quiz

Spec 4.5.7 · AQA GCSE Physics: Quiz

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5 questions, one answer each

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  1. 1. A car of mass 1500 kg is travelling at 8 m/s. Calculate its momentum.

    • A. 12,000 kg m/s
    • B. 187.5 kg m/s
    • C. 1508 kg m/s
    • D. 11,500 kg m/s

  2. 2. What does the principle of conservation of momentum state?

    • A. Momentum always increases in a collision.
    • B. The total momentum of a closed system remains constant provided no external forces act.
    • C. Momentum is lost during every collision.
    • D. The momentum of each object must be equal before and after collision.

  3. 3. Two ice skaters push off each other on frictionless ice. Skater A (mass 60 kg) moves at 2 m/s to the left. Skater B (mass 80 kg) moves to the right. Calculate the velocity of skater B, assuming they started at rest.

    • A. 1.5 m/s to the right
    • B. 2.4 m/s to the right
    • C. 1.0 m/s to the right
    • D. 3.0 m/s to the right

  4. 4. A tennis ball experiences a force of 500 N for 0.02 seconds. Calculate the impulse (change in momentum).

    • A. 10 kg m/s
    • B. 25,000 kg m/s
    • C. 480 kg m/s
    • D. 5 kg m/s

  5. 5. Explain why air bags reduce injuries in car crashes compared to no air bags, using the relationship F = mΔv/Δt.

    • A. Air bags increase the change in velocity, so the force is larger.
    • B. Air bags decrease the mass of the passenger, reducing force.
    • C. Air bags increase the time over which the passenger's velocity changes, reducing the force experienced.
    • D. Air bags apply an additional force that cancels out the collision force.

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