chp 8 momentum flashcardizz review

Front

What happens to a system's momentum if a net force acts on it?

Back

The system's momentum will change.

Front

Is the vector sum of the momenta the same before and after a collision?

Back

True, the vector sum of the momenta is conserved in a closed system.

Front

How is momentum defined?

Back

Momentum is defined as the total amount of motion an object has due to its mass and velocity.

Front

Calculate the momentum of a 55-kg running back moving westward at 10 m/s.

Back

550 kg·m/s, west

Front

If the momentum of an object changes and its mass remains constant, what can be said about its velocity?

Back

Its velocity is changing.

Front

What is the formula for calculating momentum?

Back

Momentum (p) = mass (m) × velocity (v).

Front

What is the unit of momentum?

Back

The unit of momentum is kg·m/s.

Front

What does it mean if momentum is conserved in a collision?

Back

It means that the total momentum before the collision is equal to the total momentum after the collision.

Front

What is an example of a situation where momentum is not conserved?

Back

Inelastic collisions, where kinetic energy is not conserved.

Front

What is the relationship between force and momentum?

Back

A net force acting on an object causes a change in momentum over time.