Force Review

Which is NOT an example of work?

• throwing a ball
• using a magnet to separate a penny from iron shavings
• pushing against a wall
• jumping on a trampoline

A basketball player throws a basketball toward the net.  The balls fall back down.  What force causes the ball to fall back down?

• the pull of gravity
• the push of the ball
• the push of the player
• the pull of air pressure

A bicyclist rides on a flat road and then stops pedaling, but does not apply the brakes.  The bicyclists stops because of

• balance
• friction
• attraction
• magnetism

How are the forces of magnetism and gravity similar?

• They are both at the center of the earth
• they both can pull objects toward each other
• they can push objects towards each other
• they fall to the ground

A student sets a block at the top of a wooden ramp.  The student pushes the block.  As the block slides down the ramp, it slows down and then comes to a stop.  What force causes the block to slow down? 

• the force of gravity
• the force of friction
• the force of magnetism
• the force of the student's push

The principal's chair has wheels.  It sits on her office floor next to her desk.  She pulls the chair away from her desk.  What makes her chair move?

• the force of gravity
• the force of her pull on the chair
• friction between her hand and the chair
• friction between the wheels and the floor

Force is a

• distance
• push or pull
• motion
• speed

Which of the following items is necessary in a laboratory for safety purposes?

• balance
• metric ruler
• computer monitor
• fire extinguisher

Which type of motion is shown by the swing?

• back and forth
• straight line
• circular
• irregular

A student places a ball on the ground and kicks it.  The ball moves along the ground.  Why does the ball move?

• The kick decreases the weight of the ball
• The kick applies a force to the ball
• The kick decreases the force of the gravity acting on the ball
• The kick removes friction between the ball and the ground