Question

1. What is the momentum of a 4kg cat running at a speed of 8m/s?

a. 2kg m/s
b. 4kg m/s
c. 12kg m/s
d. 32kg m/s

2. How could an object with a large mass have the same momentum as an object with a smaller mass?
a. The object with a large mass have the same momentum as an object with a smaller mass?
b. The object with the greater mass has a greater velocity.
c. The object with the smaller mass has greater acceleration.
d. The object with the larger mass has greater acceleration.

Answer 1

1. Momentum is the product of mass and velocity:

(4 kg)·(8 m/s) = 32 kg·m/s

(Note: the units of kg·m/s tell you this.)

2. Momentum is the product of mass and velocity, so two objects with different masses can have the same momentum if ...

the object with the smaller mass has a greater velocity.