Momentum

The difference between a car hitting a wall vs. a car hitting a hay stack is

• the Impulse on the car hitting the wall is greater
• the change in momentum of the car hitting the wall is greater
• the force on the car hitting the hay stack is greater
• the collision time of the car hitting the hay stack is greater

When is momentum conserved in a collision?

• When the collision is inelastic.
• When the collision is elastic.
• When the collision is inelastic OR elastic but never an explosion.
• All collisions.

T/F:  Impulse is a force.

• True
• False

T/F:  During a collision, one object will gain momentum and the second object will lose the same amount of momentum gained by the first object.

• True
• False

A club hit a golf ball with 1500 N of force and is contact with it for 0.5 seconds. Find the impulse on the ball.

• 750 N s
• 3000 N s
• 1500 N s
• 300 N s

When a bat collides with a baseball, the momentum of the bat

• transfers to the momentum of the ball
• transfers from the momentum of the ball
• does not transfer from the bat to the ball
• does not transfer from the ball to the bat

True or False: Weight is a Force

• true
• False

A 3 kg steel block is at rest on a frictionless horizontal surface.  A 1 kg lump of clay is propelled horizontally at 6 m/s toward the block as shown in the diagram.  Upon collision, the clay and steel block stick together and move to the right with a speed of

• 1.5 m/s
• 2.0 m/s
• 3.0 m/s
• 6.0 m/s

The momentum of an object depends upon the object's ___________&_____________.  

• size and shape
• mass and speed
• mass and velocity
• mass and energy

Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?

• car
• bike
• they are equal
• cannot determine using the info provided