Momentum Collisions and Impulse

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

A 1.6 kg mass moving at +5.5 m/s strikes a 2.4 kg mass moving at +2.5 m/s. If the 1.6 kg object's velocity is 1.9 m/s after the crash, what is the velocity of the 2.4 kg object?

• +5.5 m/s

• +3.6 m/s

• -1.15 m/s

• +4.86 m/s

Tags

NGSS.HS-PS2-2

A 11 kg cart moving at 5 m/s collides with a 7 kg cart moving 2 m/s. If the carts stick together after the collision, what is the velocity after the collision?

• 6.3 m/s

• 3.8 m/s

• 9.9 m/s

• 4.1 m/s

Tags

NGSS.HS-PS2-2

Which of the following represents an equation for an inelastic collision where the momentum of two objects collide and stick?

• P1_Before + P2_Before = P1_After + P2_After

• P_Before = P_After

• P1_Before + P2_Before = P_(1+2)After

• P1_Before + I = P1_After + P2_After

Tags

NGSS.HS-PS2-2

Calculate the momentum of a 1kg car that is moving at a velocity of 50m/s?

• 49 kg m/s

• 50 kg m/s

• 51 kg m/s

• 52 kg m/s

Tags

NGSS.HS-PS2-2

When the speed of an object is doubled, its momentum

• remains unchanged in accord with the conservation of momentum.

• doubles

• quadruples

• decreases

Tags

NGSS.HS-PS2-2

Which object has the greatest momentum?

• An 18-wheeler tractor trailer at rest.

• An average mass person walking.

• A sports car driving on the highway.

Tags

NGSS.HS-PS2-2

A track athlete throws a discus that has a momentum of 42kg*m/s into a field with a velocity of 21 m/s. What is the mass of the discus?

• 1 kg

• 2 kg

• 3 kg

• 4 kg

Tags

NGSS.HS-PS2-1

Momentum is conserved in this type of collision

• elastic

• inelastic

• momentum is conserved in both types of collisions

Tags

NGSS.HS-PS2-2

Two skaters initially at rest push against each other so that they move in opposite directions. When they begin moving, which skater will have a greater momentum?

• we need to know the mass of the skaters to answer this question

• they will have the same magnitude momentum

• the larger one will have a smaller momentum, and the smaller skater will have a greater momentum

• the smaller skater will have a smaller momentum, and the larger skater will have a greater momentum

Tags

NGSS.HS-PS2-2