Law of Conservation of Momentum

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.MS-PS2-1

NGSS.MS-PS2-2

Which object listed below has the greatest momentum?

• 0.05 kg object rolling at 0.2 m/s.

• 0.15 kg object rolling at 2 m/s.

• 0.15 kg object rolling at 1 m/s

• 0.4 kg object rolling at 2 m/s.

Tags

NGSS.MS-PS3-1

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

• more than 

• less than 

• equal to

• unrelated to

Tags

NGSS.MS-PS2-1

A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?

• For every action there is an equal and opposite reaction.

• Every mass exerts a force on every other mass.

• An object at rest tends to stay at rest.

• Friction opposes the motion of an object.

Tags

NGSS.MS-PS2-1

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

In any collision (crash) the ______ is ALWAYS constant

• Total Momentum

• total speed

• total Velocity

• Energy

Tags

NGSS.MS-PS2-1

The definition of momentum is

• Mass in Motion

• The size of an object

• The velocity of an object

• A comparison between two objects

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

A 5 kg object moving at 3 m/s collides with a 2 kg object at rest. What is the total momentum of the system after the collision?

• 15 kg m/s

• 10 kg m/s

• 5 kg m/s

• 0 kg m/s

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the following best describes the Law of Conservation of Momentum?

• Momentum is always conserved in an isolated system.

• Momentum can be created or destroyed in an isolated system.

• Momentum is only conserved in elastic collisions.

• Momentum is only conserved in inelastic collisions.

Tags

NGSS.HS-PS2-2

Two ice skaters push off from each other. If Skater A has a mass of 50 kg and moves at 2 m/s, and Skater B has a mass of 75 kg, what is Skater B's velocity?

• 1.33 m/s

• 2 m/s

• 0.67 m/s

• 3 m/s

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2