Physics - Momentum & Impulse

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = mv, where p is momentum, m is mass, and v is velocity.

Front

What is impulse?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time, calculated as Impulse = Force × Time.

Front

What are the units of momentum?

Back

The units of momentum are kilogram meters per second (kg*m/s).

Front

What are the units of impulse?

Back

The units of impulse are also Newton seconds (N*s) or kilogram meters per second (kg*m/s).

Front

How do you calculate the momentum of an object?

Back

Momentum is calculated using the formula p = mv, where p is momentum, m is mass in kilograms, and v is velocity in meters per second.

Front

How do you calculate impulse?

Back

Impulse is calculated using the formula Impulse = Force × Time, where Force is in Newtons and Time is in seconds.

Front

What is the relationship between impulse and momentum?

Back

Impulse is equal to the change in momentum of an object. This is expressed in the impulse-momentum theorem: Impulse = Δp.

Front

If a soccer ball has a mass of 0.5 kg and is moving at 20 m/s, what is its momentum?

Back

Momentum = 0.5 kg × 20 m/s = 10 kg*m/s.

Front

If a force of 10 N is applied for 3 seconds, what is the impulse?

Back

Impulse = Force × Time = 10 N × 3 s = 30 N*s.

Front

True or False: A larger mass moving at a slower speed can have the same momentum as a smaller mass moving at a faster speed.

Back

True. Momentum depends on both mass and velocity.