Unit 3 Lesson 7 Do Now Free Fall and Momentum

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 the unit of momentum?

Back

The unit for momentum is kg*m/s.

Front

Is momentum always conserved in a closed system?

Back

Yes, momentum is always conserved in a closed system, meaning the total momentum before an event is equal to the total momentum after the event.

Front

What happens to the momentum of an object if its velocity is 0 m/s?

Back

If an object's velocity is 0 m/s, it has no momentum.

Front

What type of collision occurs when billiard balls collide?

Back

Billiard balls colliding with each other is an example of an elastic collision.

Front

What is free fall?

Back

Free fall is the motion of an object under the influence of gravity only, with no other forces acting on it.

Front

Do objects of different masses fall at the same rate in free fall?

Back

Yes, in free fall, objects of different masses fall at the same rate regardless of their mass.

Front

What is the principle of conservation of momentum?

Back

The principle of conservation of momentum states that the total momentum of a closed system remains constant if no external forces act on it.

Front

What is an elastic collision?

Back

An elastic collision is a collision in which both momentum and kinetic energy are conserved.

Front

What is an inelastic collision?

Back

An inelastic collision is a collision in which momentum is conserved, but kinetic energy is not.