Change in Friction, Mass, and force

If a force is applied in the same direction an object is moving, the object will _____________.

• Speed Up
• Slow Down
• Change Direction
• Stop

If two objects have the same mass, the object acted on by a _______  ________ will have the greatest change in speed.

• smaller force
• greater force
• greater velocity
• smaller velocity

In scenario A, a ball is being pushed along by a strong force. If the force was suddenly decreased (like in scenario B), what would happen to the motion of the ball?

• It would speed up
• It would slow down
• It would change direction
• It would remain the same

This force causes objects to slow down, speed up, or change direction. __________________

• Unbalanced Force
• Balanced Force
  Balanced
• Strong Force
• Equal Force

Friction is a force that acts in an ___________ direction of movement.

• similar
• opposite
• parallel
• west

A type of friction that occurs when air pushes against a moving object causing it to negatively accelerate

• surface area
• air resistance
• descent velocity
• gravity 

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed
• nothing

Which of the following is NOT an example of friction?

• Brakes used on a bike
• Tires from a car on the road
• Tread on the bottom of your shoes
• The north and south poles attract

Which is NOT a way to reduce friction?

• reduce the force acting between the 2 surfaces
• reduce the roughness of the 2 surfaces coming in contact
• use wax, grease or oil
• don't touch the object

The rougher the surface, the faster an object will travel over the surface.

• True
• False