Conservation of Momentum

According to the Law of Conservation of Momentum, when two objects collide:

• both objects lose momentum.

• both objects gain momentum

• momentum is neither lost nor gained.

• momentum is always lost or gainer.

Tags

NGSS.HS-PS2-2

Two soccer balls collide. The first soccer ball hits the second soccer ball which was at rest on the ground. What is true of the momentum?

• The total momentum of the isolated system stays the same.

• The total momentum of the isolated system decreases.

• The total momentum of the isolated system increases.

• The total momentum of the isolated system equals zero since the second soccer ball was at rest.

Tags

NGSS.HS-PS2-2

A cannon with a mass of 1455 kg fires a 9.4 kg cannon ball with a velocity of 92 m/s. With what velocity does the cannon move after the cannon ball is fired?

• -0.59 m/s

• 0.59 m/s

• -1.68 m/s

• 1.68 m/s

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

What is the SI unit for momentum?

• g m/s

• kg m/s

• m/s

• kg/s

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NGSS.HS-PS2-2

What does the principle of conservation of momentum imply for a closed system?

• The total energy of the system is conserved.

• The total momentum of the system before an event is equal to the total momentum after the event.

• The total mass of the system is conserved.

• The total force acting on the system is zero.

Tags

NGSS.HS-PS2-2

According to the Law of Conservation of Momentum, in the absence of external forces, the total momentum of a system

• Increases over time

• Decreases over time

• Remains constant

• Becomes zero

Tags

NGSS.HS-PS2-2

In an elastic collision, which of the following is conserved?

• Only kinetic energy

• Only momentum

• Both momentum and kinetic energy

• Neither momentum nor kinetic energy

Tags

NGSS.HS-PS2-2

In any collision (crash) the ______ is ALWAYS constant

• Total Momentum

• total speed

• total Velocity

• Energy

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NGSS.HS-PS2-2

What is required for two objects to have an elastic collision in a one-dimensional system?

• Their masses must be equal.

• They must collide head-on.

• They must not stick together after the collision.

• They must exchange their velocities.

Tags

NGSS.HS-PS2-2

A 7.5 kg purple bowling ball is rolling down the lane at 5 m/s. A 7.5 kg red bowling ball is rolling down another lane at 5 m/s. Which of the following statements is true?

• Both bowling balls have the same momentum.

• The purple bowling ball has a greater momentum.

• The red bowling ball has a greater momentum.

• The momentums of the bowling balls cannot be determined.

Tags

NGSS.HS-PS2-2