Momentum and Impulse Conceptual Questions

Front

What is impulse?

Back

Impulse is the product of the force applied to an object and the time duration over which the force is applied. It is measured in Newton-seconds (N.s).

Front

How is impulse calculated?

Back

Impulse = Force × Time.

Front

What is momentum?

Back

Momentum is the quantity of motion an object has, calculated as the product of its mass and velocity. It is measured in kilogram-meters per second (kg.m/s).

Front

How is momentum calculated?

Back

Momentum = Mass × Velocity.

Front

What factors affect the momentum of an object?

Back

Momentum depends on the object's mass and velocity.

Front

What happens to momentum in a closed system?

Back

In a closed system, the total momentum before an event (like a collision) is equal to the total momentum after the event, according to the law of conservation of momentum.

Front

What is the relationship between impulse and momentum?

Back

Impulse is equal to the change in momentum of an object. Impulse = Change in Momentum.

Front

Why do padded dashboards reduce injuries in car accidents?

Back

Padded dashboards increase the time over which the collision occurs, reducing the force experienced by the occupants and thus reducing injuries.

Front

What is the unit of momentum?

Back

The unit of momentum is kilogram-meters per second (kg.m/s).

Front

If a 2 kg object is moving at 3 m/s, what is its momentum?

Back

Momentum = Mass × Velocity = 2 kg × 3 m/s = 6 kg.m/s.