Force

What unit do we use for force? 

• m/s
• kilogram
• meter
• Newton

Newton's first law of motion describes an object tendency to resist a change in motion. This resistance is also called what? 

• inertia 
• velocity
• friction
• acceleration 

Force equals mass times what?

• mass
• acceleration
•  velocity
• momentum 

Janet is sliding a box across the floor. What does she need to know to calculate the force on the box? 

• mass and inertia
• mass and acceleration
• friction and gravity 
• acceleration and friction 

According to New's THIRD law, an action force and its reaction force are.. 

• different in size and direction. 
• different in size but the same in direction. 
• equal in size and direction. 
• equal in size but opposite in direction. 

A soccer player kicks a ball at rest. What do you predict will happen? 

• The ball will lose momentum
• the ball will not move
• the ball will accelerate in the opposite direction of the applied force 
• The ball will accelerate in the same direction as the applied force. 

What is a push or a pull called? 

• motion
• force
• velocity 
• inertia 

If all forces acting upon an object are balanced then what will happen? 

• its motion won't change
• it will change direction
• it will accelerate 
• its motion will stop. 

A car is traveling down the highway at a constant velocity of 30 m/s. Are the forces balanced or unbalanced? 

• balanced 
• unbalanced 

A car is traveling down the highway at a velocity of 30 m/s. It applies its brakes and comes to a stop. Hitting the brakes is what type of force? 

• balanced force 
• net force
• unbalanced force 
• inertia