Forces and Motion

A man is pushing a shopping cart. Which letter represents the direction the cart will roll?

• A

• B

• C

• D

The diagram shows an overhead view of a ball rolling. A person gently kicks the ball in the direction shown. In which direction will the ball most likely move after it has been kicked?

• A

• B

• C

• D

Which of the following is a pulling force?

• Typing on a keyboard

• Opening a drawer

• Hitting a baseball

• Hammering a nail

Which of the following is a pushing force?

• A. A magnet attracting paper clips

• B. Playing tug-of-war

• C. Kicking a ball

• D. Opening the refrigerator

Students are playing tug-of-war. If each student is equally strong, which team should win?

• Team A, because they are using less force.

• Team B, because they are using less force.

• Team A, because they are using more force.

• Team B, because they are using more force.

Which wheelbarrow would be most difficult to push?

• Wheelbarrow 1, because it has more mass.

• Wheelbarrow 2, because it has less mass.

• It is not possible to push either wheelbarrow.

• Both wheelbarrows would require the same amount of force to move.

Why do ice skates glide easily on ice?

• A. A low amount of friction slows skate down.

• B. A high amount of friction speeds skates up.

• C. A high amount of friction slows skates down.

• D. A low amount of friction speeds skates up.

What force is responsible for making a ramp helpful?

• Friction

• Gravity

• Magnetism

• Electricity

A park is installing a roller skating track. Which surface would allow roller skaters to skate fastest?

• Rocky gravel

• Thick carpet

• Brushed concrete

• Polished glass

A canoer is paddling in the river in the opposite direction than the river is flowing. The canoer paddles forward with 50 Newtons of force while the water is flowing backward with 40 Newtons of force. How will the canoe move?

• The canoe will move forward.

• The canoe will move backward.

• The canoe will stop moving.

• The canoe will stop and then start moving.