Problems

4.3 Newton's Second Law of Motion

21 .

An object has a mass of

1\,\text{kg}

on Earth. What is its weight on the moon?

$1\,\text {N}$
$1.67\,\text {N}$
$9.8\,\text{N}$
$10\,\text{N}$

22.

A bathroom scale shows your mass as 55 kg. What will it read on the moon?

9.4 kg
10.5 kg
55.0 kg
91.9 kg

4.4 Newton's Third Law of Motion

23.

A person pushes an object of mass 5.0 kg along the floor by applying a force. If the object experiences a friction force of 10 N and accelerates at 18 m/s², what is the magnitude of the force exerted by the person?

−90 N
−80 N
90 N
100 N