2nd Summative Test

Michael and Grace are having a debate: Is the impulse given to an object equal to the change in momentum?

• True

• 
  Could be either.

• False

• Not enough information to tell.

Scarlett, Daniel, and Benjamin are all excited to test their knowledge! Airbags and collapsible bumpers both ​ (a)______   the ​ (b) ______  to ​ (c) _____  the force in a collision.

• a. lengthen

• b. time

• c.
  shorten

• d. work

• 
  e.
  decrease

Two penguins, Mia and David, are having a sliding race on an iceberg! Mia, a particularly chubby penguin weighing 40 kg, slides down the iceberg at 14 m/s and accidentally bumps into David, a smaller penguin weighing 29 kg. They bounce off each other. If Mia slides to the left at -1.4 m/s, what is the velocity of David?

• a.
  17.4 m/s

• b.

  56 m/s

• c.
  -21.2 m/s

• d.21.2 m/s

1. Coach Smith challenges Kai, Emma, and Hannah to strike a 0.058 kg golf ball with a force of 272 N, giving it a velocity of 62.0 m/s. How long was the club in contact with the ball?

• 
  a..013 seconds

• b.
  .026 seconds

• c.

  3.6 seconds

• d.

  .058 seconds

1. Michael's 5500 kg freight truck goes from 4.2 m/s to 7.8 m/s in 15.0 s by applying a constant force. 

What is the change in momentum?

• 
  a. 42900 kg⋅m/s

• b.
  3670 kg⋅m/s

• c.

  19800 kg⋅m/s

• d.

  63490 kg⋅m/s

Liam was enjoying his coffee at the local coffee shop when he witnessed an exciting event - two cars collided and stuck together! What type of collision did Liam observe?

Oliver and David are debating whether the impulse given to an object is equal to the change in kinetic energy. Who do you think is correct?

• a. Oliver is right!

• b. Not enough information to tell!

• c. David knows the answer!

• d. Only in certain situations

While playing pool, Liam and Evelyn notice that the pool balls bounce apart in a super cool way! What type of collision is this?

Which of the following factors determine the momentum of an object: its mass and velocity?

• a.
  size and shape

• b. mass and veloctiy

• c.
  mass and speed
  

• d. mass and energy

Arjun, Aria, and Priya are competing in a momentum challenge! What is the equation to calculate momentum?

• a.
  p=mv

• b.
  p=mgh

• c.
  p=1/2mv²

• d.
  p=mg