Conservation of Momentum

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

An 1 kg object moving to the right at 2 m/s collides inelastically with a 1 kg object moving to the left at 2 m/s. The final velocity of both objects will be 

• 0 m/s

• 1 m/s

• 2 m/s

• 4 m/s

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A large box slides across a frictionless surface with a velocity of 12 m/s and a mass of 4 kg,  collides with a smaller box with a mass of 2 kg that is stationary.  The boxes stick together. What is the velocity of the two combined masses after collision?

• 0 m/s

• 4 m/s

• 8 m/s

• 12 m/s

Tags

NGSS.HS-PS2-2

A 120 kg lineman moving at -2 m/s tackles an 80 kg fullback moving at +8 m/s. If the fullback's velocity after they collide is +2 m/s, what is the lineman's velocity?

• 2 m/s

• 8.7 m/s

• 4.7 m/s

• 6 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 m/s 

• 3.4 m/s 

• 4.6 m/s 

• 7.1 m/s

Tags

NGSS.HS-PS2-2

A 3,000 kg truck moving at +10 m/s hits a 1,000 kg parked car which moves off at +15 m/s. What is the velocity of the truck?

• 10 m/s

• 0 m/s

• 5 m/s

• 2 m/s

Tags

NGSS.HS-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.HS-PS2-2

A runner has a momentum of 670 kg m/s and is traveling at a velocity of 9 m/s. What is his mass?

• 6030 kg

• 0.0134 kg

• 74.4 kg

• 80 kg

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A 1.0-kilogram laboratory cart moving with a velocity of 0.50 meter per second due east collides with and sticks to a similar cart initially at rest. After the collision, the two carts move off together with a velocity of 0.25 meter per second due east. The total momentum of this frictionless system is

• zero before the collision

• zero after the collision

• the same before and after the collision

• greater before the collision than after the collision

Tags

NGSS.HS-PS2-2

When a 1.0-kilogram cart moving with a speed of 0.50 meter per second on a horizontal surface collides with a second 1.0-kilogram cart initially at rest, the carts lock together. What is the speed of the combined carts after the collision? [Neglect friction.]

• 1.0 m/s

• 0.50 m/s

• 0.25 m/s

• 0 m/s

Tags

NGSS.HS-PS2-2