Momentum Quiz Review

Which has more momentum, a 1000 kg car moving 1 m/s or a 70 kg person sprinting at 8 m/s?

• The car

• The person

A tennis ball may leave a top player’s racket on the serve with a speed of 65.0 m/s. If the ball’s mass is 0.0600 kg, what is its momentum before it is hit with the racket?

• 3.9 kg*m/s

• 3.9 kg

• 3.9 m/s

• 3.9 m/s²

All moving objects have momentum.

• True

• False

Which of the following objects has the largest momentum?

• A 500 kg car traveling at 2 m/s

• A 70 kg person traveling at 5 m/s

• A 0.5 kg soccer ball traveling at 1 m/s

• A 5000 kg elephant standing still

True or False: The law of conservation of momentum states that the momentum before a collision will always be greater than the momentum after a collision.

• True

• False

A 30 kg child running at 7 m/s jumps onto a 10 kg sled which was initially at rest. What was the child's momentum BEFORE she jumped onto the sled?

• 210 kg*m/s

• 210 kg

• 210 m/s

• 210 m/s²

A 30 kg child running at 7 m/s jumps onto a 10 kg sled which was initially at rest. What was the sled's momentum BEFORE the child jumped onto it?

• 0 kg*m/s

• 0 kg

• 0 m/s

• 0m/s²

A 30 kg child running at 7 m/s jumps onto a 10 kg sled which was initially at rest. What was the total momentum when the child landed on the sled?

• 210 kg*m/s

• 0 kg*m/s

• 210 m/s

• 0 m/s

A 1500 kg car traveling 5.0 m/s collides head on with a 3000 kg truck traveling 7.0 m/s in the opposite direction. What is the car’s momentum before the collision?

• 7500 kg*m/s

• 750 kg*m/s

• 700 kg*m/s

• 50 kg*m/s

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

• size and shape
• mass and speed
• mass and veloctiy
• mass and energy

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