Force and Motion

Which effect of force is best exhibited when a person hits the break of a motorcycle?

• Force stops a moving object.

• Force increases the speed of the moving object.

• Force changes the direction of a moving object.

• Force can start motion.

Which of the following surfaces has more friction?

• wet floor

• skating rink

• bumpy road

• well-polished floor

Which of the following is a temporary magnet?

• cobalt    

• nickel

• magnetite

• iron nail

Which of the following statements is TRUE about magnetic force?

• Like poles of the magnet attract each other.

• Unlike poles of the magnet attract each other.

Which action exhibits a "pull" motion?

• throwing a ball

• closing a drawer

• going down the slide

• raising a flag on a pole

Which of the following terms refers to a space that surrounds a magnet in which force can be observed?

• magnetic field

• magnetic compass

• magnetic materials

Which effect of force best describes a person hitting the ball during a baseball match?

• Force stops the motion of an object.

• Force makes an object start motion.

• Force changes the direction of a moving object.

Which of the following is a magnetic object?

• rubber

• plastic

• wood

• iron nails