Answers350CR Integrated ScienceUnit Test

Unit Test — Unit test Answers

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What is the purpose of a free body diagram?

A
to show the velocity of an object
B
to show the acceleration of an object
C
to show the forces acting on an object
D
to show the direction of motion vectors of an object
22
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Two grocery carts have the same initial total momentum. The two carts collide, and now cart B has a greater final velocity.

A
It is less if cart B has a smaller mass.
B
It is greater if cart B has a greater mass.
C
It is the same if no external forces are added.
D
It depends on the masses of cart A and cart B.
23

What type of relationship exists between momentum and mass?

A
direct
B
inverse
C
logarithmic
D
quadratic
24

In a lab, two identical lab carts (m = 1.0 kg) travel toward each other, each with a speed of 2 m/s. The cars collide, and one cart moves to the right with a speed of 3 m/s and the other moves left with a speed of 2 m/s.

A
This experiment did not occur in a closed system.
B
This proves the conservation of momentum since pi = pf .
C
An additional mass was added to one cart, which explains the increase in speed.
D
The increase in speed was due to the kinetic energy from one cart transferring to the other.
25

In an elastic collision, energy is conserved.

Answer not available

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