Mechanics Quiz

The momentum of an object is defined as the _____________.

• mass of the object
• velocity of the object
• product of mass and velocity
• change in velocity over time

An objects momentum can be calculated by multiplying the velocity of the object by its_____.

• time
• mass
• acceleration
• length

Which has a greater momentum a semi-truck at rest or a bicycle in motion?

• truck
• bicycle
• neither has momentum
• same

Applying a force for a longer time increases the change in _________.

• mass
• gravity
• momentum
• time

_______ is a change in momentum.

• Impulse
• Gravity
• Mass
• Distance

When a golf club hits a golf ball, the change in momentum of the club is_______the change in momentum of the ball.

• less than
• greater than
• equal to
• none of the answers

The momentum of a 225 g softball moving at 35 m/s is

• 7.9 kg m/s
• 3.5 N
• 5.0 m/s
• 2.1 kg m/s

An 81 kg football player moving 6.5 m/s tackles and collides with a stationary 140 kg football player. What speed will the football players have the moment after impact?

• 0 m/s
• 4.8 m/s
• 2.4 m/s
• 3.8 m/s

A 740 kg car traveling 19 m/s comes to a complete stop in 2.0 s. What is the force exerted on the car during this stop?

• 85 N
• 850 N
• 7000 N
• 9200 N

The law of of____________ of momentum states that momentum is neither created nor destroyed.

• gravitation
• conservation
• preservation
• reservation