A(n) __________ is a push or a pull that one body exerts on another.

• acceleration

• force

• motion

• velocity

The __________ is the combination of all the forces acting on an object.

• direction of motion

• force pair

• inertia

• net force

Forces that cancel each other are called __________ forces.

• balanced

• inactivated

• neutral

• null

Which best demonstrates friction?

• an ice-skater sliding across the ice without noticeably slowing down

• a car rolling to a stop at a traffic light

• a baseball moving in a projectile motion

• the free fall of astronauts in orbit

A snow skier slowing to a stop after skiing down a mountain demonstrates __________ friction.

• air

• rolling

• sliding

• static

If there is a box and we have a person on the left and right side of the box. Both push on the box with 10 N(newtons) of force. What it the total net force on the object 

• 10 N right

• 10 N left

• 20 N

• 0 N

If there is a box and we have a person on the left and right side of the box. The person on the left pushes to the right with 20 N of force the person on the Right pushes to the left with 10 N of force. The net force on the box will be? 

• 10 N right

• 10 N left

• 20 N

• 0 N

If there is a box and we have a person on the left and right side of the box. The person on the left pushes to the right with 10 N of force the person on the Right pushes to the left with 20 N of force. The net force on the box will be? 

• 10 N right

• 10 N left

• 20 N

• 0 N

If there is a box and we have 2 people on the left side of the box pushing right with 20 newtons of force EACH what is the total net force on the box?

• 40 N right

• 20 N right

• 40 N left

• 0 N

is the force that opposes the sliding motion of 2 surfaces that are touching each other 

• friction

• acceleration

• Gravity

• mass