Impulse and Momentum - Concept Review

Front

What is the relationship between impulse and momentum?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time. It is given by the formula: Impulse = Force × Time = Change in Momentum.

Front

Define momentum.

Back

Front

What is the unit of momentum?

Back

The unit of momentum is kilogram meter per second (kg·m/s).

Front

True or False: The momentum of an object can be zero if it is at rest.

Back

True. If an object is at rest, its velocity is zero, and therefore its momentum is also zero.

Front

If an object has a mass of 5 kg and is moving at a speed of 3 m/s, what is its momentum?

Back

Front

What happens to the momentum of an object if its mass is doubled while its velocity remains constant?

Back

Front

Explain the concept of impulse.

Back

Impulse is the effect of a force applied over a period of time. It is equal to the change in momentum of an object and is calculated as: Impulse = Force × Time.

Front

What is the formula for calculating impulse?

Back

Impulse = Force × Time = Change in Momentum.

Front

If a football player braces for a tackle, what effect does this have on the force experienced?

Back

Bracing increases the rigidity of the body, which decreases the time of impact and increases the force experienced. It is better to relax to extend the time of impact and reduce the force.

Front

If two objects have the same mass, which one has more momentum if one is moving faster?

Back

The faster moving object has more momentum, as momentum is directly proportional to velocity.