KS3 Forces and Motion

A contact force is from

• objects physically touching

• far apart objects

• not touching object

• always a pull

This game of tug of war is an example of _________ forces.

• unbalanced

• balanced

• potential

• net zero

What will the net force on the soccer ball be?

• 50 N to the left

• 50 N to the right

• 200 N to the left

• 200 N to the right

What is the net force on the car?

• 400 N forward (left)

• 0 N (balanced forces)

• 200 N forward (left)

• 200 N backward (right)

What effect does friction have on a moving object?

• it causes the moving object to slow and eventually stop

• it causes the moving object to speed up

• it keeps the moving object moving in the same direction forever

• it causes the moving object to turn around and move in the opposite direction

Person on the left = 45 N

Person on the right = 32 N

What is the net force?

• zero N

• 10 N

• 77 N

• 13 N

A force that opposes motion is

• friction

• inertia

• acceleration

• momentum

Equal forces that do not cause a change in an objects motion

• Unbalance force

• Push or a pull

• Balanced force

• Average speed

Are unequal forces that cause a change in the motion of an object

• Balanced forces

• Unbalanced forces

• Inertia

• Gravity

Are forces balanced or unbalanced when a marble speeds up rolling down a ramp?

• Balanced
• Unbalanced