Conservation of Momentum

The total momentum of two objects before collision is 450 kgm/s. What will be their total momentum after collision?

• 0 kgm/s

• 175 kgm/s

• 350 kgm/s

• 450 kgm/s

Calculate the momentum of a car, which has a mass of 1000 kg and moves with a velocity of 20 m/s.

• 500 kgm/s

• 10, 020 kgm/s

• 20000 kgm/s

• 99 980 kg m/s

Two objects with a total mass of 20 kg has an initial momentum of 100 kg∙m/s. If the masses stick together after the collision, what is the final velocity of the masses?

• 1 m/s

• 5 m/s

• 50 m/s

• 100 m/s

The
total momentum of the two objects
before the collision ___________ the total
momentum of the two objects after the
collision.

What is the momentum of a bird with a mass of 0.018 kg flying at 15 m/s?

_______ kgm/s

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.

A glass falling onto a tile floor will likely break. A glass falling onto a carpeted floor may not break because

the glass has more time in which to stop.

• True

• False

Two stationary carts are tied together by a thread with a compressed spring held between them. When the

thread is cut, the two carts move apart. After the spring is released, one cart m=3.00kg travels east with

a velocity of 0.82 m/s. What is the velocity of the second cart m=1.70kg after the spring is released?

• -3.80 m/s

• -1.20 m/s

• -2.75 m/s

• -1.45 m/s