Laws of Motion Study Guide

What is a non-contact force?

• Friction

• Gravity

• Pushing a cart

• Pulling a rope

What opposes the motion of objects sliding past each other?

• Static Friction

• Fluid Friction

• Sliding Friction

• Air Resistance

What is the unit of force?

• Meter per second squared

• Pascal

• Newton

• Kilogram

What happens when net forces acting on an object are unbalanced?

• The object's mass increases

• The object changes its motion

• The object stays motionless

• The object's velocity decreases

According to Newton's 2nd Law, what is the force on an object with a mass of 10 kg and an acceleration of 3 m/s^2?

• 13 N

• 30 N

• 7 N

• 20 N

What does Newton's 3rd Law state?

• Velocity is constant unless acted upon by a force

• Objects in motion stay in motion

• Force equals mass times acceleration

• For every action, there is an equal but opposite reaction

How can you increase the momentum of an object?

• Keep its mass constant

• Decrease its velocity

• Increase its velocity

• Decrease its mass

What is conserved in an elastic collision?

• Energy

• Mass

• Momentum

• Velocity