Physics 3R Unit 3 Forces Review

The tendency of an object to maintain its motion (resist changes)...

• inertia
• force
• acceleration
• velocity

"For every action, there is an equal and opposite reaction."

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Newton's 4th Law

What is the net force?

• 11 N right
• 25 N right
• 25 N left
• 11  N left

A bus hits a bug and the bug splatters on the windshield, which force is greater?

• The force of the Bus hitting the bug
• The force of the Bug hitting the bus
• They're the same
• The force of Gravity on the bug

You hit a wall with a stick.  The equal but opposite reaction is _____

• the wall pushes against you
• the stick pushes against you
• you push against the stick
• the wall pushes against the stick

The measure of the pull of gravity on an object is ___________________.

• motion
• weight
• speed
• friction

A 20 kg bike accelerates at 10 m/s².  How much force was applied?

• 25
• 200 N
• 20 N
• 10 N

A person is pushed forward into their seat belt when a car stops.  Which law is this?

• 1st
•  2nd
• 2 and 3
• 3rd 

A/An _______ force must act on an object for it to CHANGE it's motion

• balanced

• unbalanced

• gravitational

• weight

"Action-Reaction" describes what happens

• to an object that has an unbalanced force

• between a pair of objects

• to an object that has a balanced force

• inside an object