Grade 10 Physics Quiz: Impulse and Momentum

What is the Law of Conservation of Momentum?

• Momentum decreases as the speed of an object increases

• Momentum is not related to the total mass and velocity of a system

• Total momentum of a closed system remains constant if no external forces act on it.

• Momentum is only conserved in open systems

Explain the concept of momentum and how it is conserved in a closed system.

• Momentum is conserved in a closed system only if the objects involved are at rest.

• Momentum is conserved in a closed system because the total momentum before an event is equal to the total momentum after the event, as long as no external forces are acting on the system.

• Momentum is conserved in a closed system only if the objects involved are moving at the same speed.

• Momentum is not conserved in a closed system because it depends on the mass and velocity of the objects involved.

A 2 kg ball is moving at a velocity of 5 m/s. What is its momentum?

• 2.5 kg m/s

• 10 kg m/s

• 7 kg m/s

• 25 kg m/s

In a closed system, if two objects collide and one object gains momentum, what happens to the momentum of the other object?

• The momentum of the other object increases.

• The momentum of the other object becomes zero.

• The momentum of the other object remains the same.

• The momentum of the other object decreases.

Define impulse and explain its relationship with force and time.

• Impulse is the energy stored in an object

• Impulse is the same as momentum

• Impulse is the result of mass and acceleration

• Impulse is the product of force and the time over which the force acts.

A force of 10 N is applied to an object for 5 seconds. What is the impulse experienced by the object?

• 25 Ns

• 100 Ns

• 10 Ns

• 50 Ns

How does the momentum of an object change if its mass is doubled?

• It will double

• It will stay the same

• It will be halved

• It will be tripled

What is the momentum of a 500 g ball moving at a velocity of 8 m/s?

• 2 kg m/s

• 16 kg m/s

• 4 kg m/s

• 10 kg m/s

Explain how the momentum of an object can be changed.

• By changing its color

• By increasing its temperature

• By playing music near it

• By applying a force to it for a certain amount of time

A car with a mass of 1000 kg is moving at a velocity of 20 m/s. What is its momentum?

• 20000 kg*m/s

• 1000 kg*m/s

• 40000 kg*m/s

• 500 kg*m/s