Review 2 Impulse Momentum

Which of the following has the MOST momentum?

• rolling ping-pong ball

• rolling bowling ball

• rolling soccer ball

• rolling basketball

In any collision (crash) the ______ is ALWAYS constant

• Total Momentum
• total speed
• total Velocity
• Energy

The equation to calculate momentum is

• p=mv
• p=1/2mv²
• p=mgh
• p=mg

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

• size and shape

• mass and speed

• mass and veloctiy

• mass and energy

A 5 N force is applied to a 3 kg ball to change its velocity from +9 m/s to +3 m/s. The impulse on the ball is ______ N s.

• -2.5

• -10

• -18

• -45

A 40-kilogram mass is moving across a horizontal surface at 5.0 m/s.  What is the magnitude of the net force required to bring the mass to a stop in 8.0 seconds?

• 1 N
• 40 N
• 25 N
• 5 N

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.

Calculate the impulse on the ball.

• 1 N·s

• 6 N·s

• 66 N·s

• None of these

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 the speed of an object is doubled, its momentum...

• remains unchanged in accord with the conservation of momentum.

• doubles.

• quadruples.

• decreases.

If two objects have the same mass, then the faster moving object has ____________ momentum.

• more 
• less
• the same