CP momentum

Which will have a greater momentum when moving at the same speed: a 2,000-kg truck or a 1,000-kg sedan?

• Can't answer without the value of the speed
• The sedan
• They have the same momentum
• The truck

A car with p = 12000 kg*m/s hits a truck at rest. After colliding, the truck has p = 5000 kg*m/s. What is the car's momentum after the collision?

• 12000 kg*m/s

• 5000 kg*m/s

• 7000 kg*m/s

• 17000 kg*m/s

Balls X (v = 2 m/s) & Y (at rest) have equal mass. When X collides with Y, X stops moving. What is Y's velocity after?

• Y will move to the right 0.5 m/s.
• Y will move to the right 2 m/s.
• Y will remain at rest.
• Y will move to the right at 4 m/s.

Car X moves at 2.5 m/s and Car Y is at rest. When Car X collides with Car Y, which is true?

• The momentum of Car X increases and the momentum of Car Y decreases.
• The momentum of Car X is unchanged and the momentum of Car Y increases.
• The momentum of Car X decreases and the momentum of Car Y increases.
• The momentum of Car Y is unchanged and the momentum of Car X decreases.

A 10 kg cart with a velocity of 2 m/s hits a 20 kg cart at rest. What is the total momentum of both carts afterward?

• 2 kg• m/s
• 20 kg• m/s
• 10 kg• m/s
• 30 kg• m/s

A small car crashes into a large truck. Which vehicle experiences the greater impulse?

• The car experiences a greater impulse
• The truck experiences a greater impulse
• They both experience the same impulse
• Need to know the change in momentum

Two nerds at rest push off each other. One nerds moves left with momentum 10 kg*m/s. What is other nerd's momentum after?

• 10 kg*m/s right

• 20 kg*m/s right

• 5 kg*m/s right

• 0 kg*m/s right

A 3-kg firecracker explodes into 2 unequal pieces, 1 and 2 kg. The 1-kg moves left at 10 m/s. What is the v of the 2-kg?

• 5 m/s
• 10 m/s
• 20 m/s
• 30 m/s

Two carts have equal mass. Red (v_red = 2 m/s) crashes into green (at rest) and the carts stick together. What is the velocity of the two carts after the collision?

• 0 m/s

• 2 m/s

• 1 m/s

• 4 m/s

How does an airbag reduce injuries in a car crash?

• decreases the impulse they experience as they stop

• decreases the force they feel over a greater time period

• decreases the change in momentum they experience

• decreases the change in velocity they experience