What is the law of conservation of momentum?

Answer explanation

The total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects.

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NGSS.HS-PS2-2

A metal sphere with a mass of 0.085 kg rolls along a frictionless surface at 24.0 m/s and strikes a stationary sphere having a mass of 0.210 kg.  The first sphere stops completely.  At what speed does the second sphere move away from the point of impact?

• 9.7 m/s

• 0.43 m/s

• 0.00074

• 59

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NGSS.HS-PS2-2

A swimmer with a mass of 76 kg dives off a raft with a mass of 400.0 kg. If the swimmer’s speed is 4.3 m/s immediately after leaving the raft, what is the speed of the raft?

• 0.82 m/s

• 23 m/s

• 0.0090 m/s

• 110 m/s

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NGSS.HS-PS2-2

A bowling ball with a mass of 7.3 kg strikes a pin that has a mass of 2.2 kg. The pin flies forward with a velocity of 6.2 m/s, and the ball continues forward at 4.2 m/s. What it the total final momentum?

• 31 m/s

• 14 m/s

• 44 m/s

• 9.5

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NGSS.HS-PS2-2

A bowling ball with a mass of 7.3 kg strikes a pin that has a mass of 2.2 kg. The pin flies forward with a velocity of 6.2 m/s, and the ball continues forward at 4.2 m/s. What was the original velocity of the ball?

• 6.1 m/s

• 1.3 m/s

• 9.5 m/s

• 7.5 m/s

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NGSS.HS-PS2-1

NGSS.HS-PS2-2

A snowball with a mass of 0.083 kg hits a snowman's hat and sticks to it.  The hat and the snowball fall off together at 8.4 m/s, the mass of the hat is 0.145 kg.  How fast was the snowball moving at the moment of impact?

• 23 m/s

• 15 m/s

• 8.4 m/s

• 1.2 m/s

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NGSS.HS-PS2-1

NGSS.HS-PS2-2

A diver with a mass of 82.0 kg jumps from a dock into a 120.0 kg boat at rest. If the velocity of the diver in the air is +4.90 m/s, what is the final velocity of the diver after landing in the boat?

• 2.0 m/s

• 1.2 m/s

• 3.3 m/s

• 4.1 m/s

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NGSS.HS-PS2-2

A clay ball with a mass of 0.34 kg strikes another 0.34 kg clay ball at rest, and the two balls stick together. The final velocity of the balls is 2.3 m/s north. What was the first ball’s initial velocity?

• 4.6 m/s

• 1.2 m/s

• 6.8 m/s

• 3.4 m/s

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NGSS.HS-PS2-2

Which scenario uses this equation?

• generic / elastic

• inelastic collision - one object at rest

• inelastic collision - both objects moving

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NGSS.HS-PS2-2

Which scenario uses this equation?

• generic / elastic

• inelastic collision - one object at rest

• inelastic collision - both objects moving

Tags

NGSS.HS-PS2-2