Momentum Review

How is it possible for a 0.06 kg tennis ball to have more momentum than a 0.45 kg soccer ball?

• The tennis ball has a smaller mass

• The soccer ball moves in the opposite direction

• It is not possible for the tennis ball to have more momentum

• The tennis ball has more velocity than the soccer ball

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NGSS.HS-PS2-2

A shotgun fires a 0.015 kg slug at a speed of 900 m/s. The shotgun itself has a mass of 3.5 kg. What is the recoil speed of the shotgun?

• 3.86 m/s

• 2.50 m/s

• 5.10 m/s

• 1.20 m/s

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NGSS.HS-PS2-2

Two astronauts are floating stationary in space near each other. Astronaut X has a mass of 75 kg and pushes off astronaut Y, sending them to the left at 1.8 m/s. If astronaut Y's mass is 90 kg, with what velocity does astronaut X move to the right?

• 2.16 m/s

• 1.50 m/s

• 3.00

• 1,00

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NGSS.HS-PS2-2

A 2.0 kg arrow is fired at 10 m/s into a stationary 10 kg block of ice. The arrow sticks into the block of ice. What is the velocity of the arrow / ice combination after the collision?

• 2.5 m/s

• 10 m/s

• 1.7 m/s

• 5.0 m/s

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NGSS.HS-PS2-2

A 7.0 kg bowling ball traveling at 2.0 m/s collides with a stationary 0.5 kg beach ball in an elastic collision. The bowling ball leaves the collision with a velocity of 1.5 m/s traveling in the same direction as the beach ball. Calculate the speed of the beach ball.

• 1.0 m/s

• 2.0 m/s

• 3.5 m/s

• 7.0 m/s

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NGSS.HS-PS2-2

A 280 kg bumper car traveling at 1.5 m/s collides with another bumper car of the same mass moving at 0.8 m/s in the same direction. After the collision, the two cars stick together for a short time before separating. What is the velocity of the combined bumper cars after the collision?

• 1.14 m/s

• 1.00 m/s

• 1.30 m/s

• 0.80 m/s

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NGSS.HS-PS2-2

You're at a carnival trying to knock over a 0.25 kg milk bottle using a 0.07 kg ball. You throw the ball at 20 m/s at the stationary milk bottle, creating an elastic collision. The ball bounces off the bottle at 18 m/s. What is the velocity of the milk bottle after the collision?

• 2.86 m/s

• 3.50 m/s

• 1.80 m/s

• 4.20 m/s

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NGSS.HS-PS2-2

Which of the following most accurately describes conservation of momentum?

• 1. Momentum is always conserved, even when external forces are present.

• Momentum can only be conserved in systems where objects are stationary.

• The total momentum of a system remains constant if no external forces act on it.

• 1. Momentum conservation means all objects in a system move at the same speed.

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NGSS.HS-PS2-2

The approximate momentum of a stealth airplane is 2.112 x 10⁷ kg·ms at it's top speed. If the stealth plane has a mass of 65,000 kg, what is it's max velocity?

• 324. 324.9 m/s

• 553.8 m/s

• 477.9 m/s

• 255.5 m/s

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NGSS.HS-PS2-2

A kitchen worker pushes a stack of boxed potatoes from rest to 1.2 m/s. The combined mass of the potatoes is 72.5 kg, and he pushes them for 8 seconds. What force does he exert on the potatoes?

• 10.88 N

• 87,000 N

• 0.15 N

• 725 N

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NGSS.HS-PS2-1