Conservation of Momentum

Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?

• car
• bike
• they are equal
• cannot determine using the info provided

Tags

NGSS.HS-PS2-2

When two objects collide, the P_before is ____________ the P_after.

• more than 
• less than 
• equal to
• unrelated to

Tags

NGSS.HS-PS2-2

Which object listed below has the greatest momentum?

• A 0.05 kg object rolling at 0.2 m/s.
• A 0.15 kg object rolling at 2 m/s.
• A 0.15 kg object rolling at 1 m/s
• A 0.4 kg object rolling at 2 m/s.

Tags

NGSS.HS-PS2-2

In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s.  The carts stick together when they collide.  Calculate their final speed.

• 0.5 m/s
• 1.0 m/s
• 0.33 m/s
• 0.67 m/s

Tags

NGSS.HS-PS2-2

Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and -8 m/s respectively. If they grab each other as they collide, the combined speed of the two players just after the collision would be:

• -2.0 m/s

• 3.4 m/s

• -4.6 m/s

• 7.1 m/s

A .030 kg bullet is fired from a gun with a speed of 350 m/s. If the gun has a mass of 0.9 kg, What is the recoil speed of the gun?

• 11.7 m/s
• 9.0 m/s
• 10.5 m/s
• 10 m/s

Tags

NGSS.HS-PS2-2

Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other,...

• Skater 1 experiences a greater change in momentum
• Skater 2 experiences a greater change in momentum
• Skater 1 has a greater velocity than Skater 2
• Skater 1 experiences a greater force

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-1

The Law of Conservation of Momentum states:

• The total momentum before a collision is equal to the total momentum after a collision.

• The total momentum before a collision is greater than the total momentum after a collision.

• The total momentum before a collision is less than the total momentum after a collision.

• The total momentum before a collision is not related to the total momentum after a collision.

Tags

NGSS.HS-PS2-2

According to Newton's Laws, for every action there is an ....

• equal and opposite reaction.

• equal and parallel reaction.

• unequal and opposite reaction.

• unequal and unrelated reaction.

Pick all of the scenarios below that are collisions.

• A catcher catches a baseball.

• A pitcher throws a baseball.

• Two cars smash into each other.

• Two students on roller skates push away from each other.

• A bug smashes into a windshield.