Force and Motion Review

A ball rolls down a hill at a constant speed. What changes about the ball as it rolls?

• Position

• Color

• Temperature

• Shape

A bobsled glides across the ice and gradually begins to slow down. Which force is acting on the bobsled?

• magnetism

• mass

• gravity

• friction

Amyri wants to test the effect of friction on an object. Which would be the best experiment for her to test this effect?

• Use a pulley to lift several blocks

• drop a ball from different heights

• roll a toy car across different surfaces

• use a balance to find the mass of objects

A force that slows or stops motion when objects rub together is called...

• Friction

• Energy

• Magnetism

• Gravity

Ruth is throwing a ball high into the air and catching it. What is the effect of gravity on the ball?

• It increases the mass of the ball

• It pulls the ball back to the ground

• It makes the ball's speed slow down

• It makes the ball's speed remain the same

The force that acts to pull all objects down to Earth is?

• Friction

• Energy

• Magnetism

• Gravity

Which surface would probably offers the LEAST friction if you were to slide a box across it?

• Glass

• Wood

• Carpet

• Brick

Aaron designs an experiment to test the effect of force on his bike. He rides his bike along a path and finds that when he moves off the path and into the grass, his speed decreases. What is the reason for this decrease in speed?

• decrease in lift

• decrease in mass

• increase in friction

• increase in gravity

Which of these situations would probably NOT result in force from a magnetic?

• Two opposite poles facing each other

• Two of the same poles facing each other

• A magnet and a paper clip

• a magnet and a sheet of paper

Anisa is pushing on a door labeled "pull," and the door will not open. Which of these explains why the door doesn't move?

• Anisa isn't using any force

• The door isn't made of steel, iron, nickel, or cobalt.

• The force of the door is greater than the force Anisa is pushing on it

• Gravity holds the door closed