IGCSE Physics Momentum, Torque & Energy

What is the formula for momentum?

• mass x velocity

• force x distance

• mass x acceleration

• velocity / time

A car of mass 1500 kg is moving at 20 m/s. What is its momentum?

• 15,000 kg m/s

• 30,000 kg m/s

• 45,000 kg m/s

• 60,000 kg m/s

The unit of momentum is...

• kg

• m/s

• kg m/s

• N m

• N/kg

If the momentum of an object changes, what must have acted on it?

• Force

• Energy

• Work

• Friction

A 10 kg object moving at 5 m/s collides with a 15 kg object moving at 2 m/s. What is the total momentum of the system before the collision?

• 40 kg m/s

• 65 kg m/s

• 75 kg m/s

• 85 kg m/s

Which of the following best describes the principle of conservation of momentum?

• Total momentum before and after a collision is the same

• Energy is conserved in collisions

• Force equals mass times acceleration

• Work done is equal to force x distance

A car’s momentum is 50,000 kg m/s. If the mass of the car is 2,500 kg, what is its velocity?

• 10 m/s

• 15 m/s

• 20 m/s

• 25 m/s

What happens to the momentum if the velocity of an object doubles?

• Momentum doubles

• Momentum triples

• Momentum remains the same

• Momentum halves

What is the moment of a force?

• Force x distance from pivot

• Force x mass

• Force / distance

• Force x velocity

The unit of moment is...

• Joules

• Newton-meters

• Watts

• Newtons