Force Review

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

Tags

NGSS.MS-PS2-2

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

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

Which of these is attracted to a magnet?

• silver spoon
• an aluminum pan
• a copper penny
• an iron nail

Can an object in motion ever change directions?

• Yes, if another force works upon the object
• No, the object will keep moving on the same path
• Yes, the motion will change without force
• No, the object can only move if they are pulled

If these boys are pulling with the same amount of force.  What will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.