Forces and Motion

Look at the picture below. How does a baseball move the ball?

• It lifts the ball.

• It pushes the ball.

• It pulls the ball.

What makes things move?

• weight

• matter

• a push or a pull

What is the effect of pulling on the leash?

• The dog will speed up.

• The dog will slow down.

• The man will slow down.

No matter whether an object is dropped or thrown, it will always fall towards _________.

• the sky

• the water

• the ground

• the Sun

You and your friends are racing cars down a ramp. Your car is heavy and your friend’s car is light. You remember that gravity pulls on heavier objects with more force than on lighter objects. Using that knowledge, predict which car will win the race.

• the heavy car

• the light car

Which force makes it hard to ride a bike on grass?

• motion

• friction

• magnetism

You want the box to slide down the ramp as easily as possible. Which surface would allow the box to slide most easily?

• sand

• gravel

• ice

Friction is a force that _______________.

• pulls two objects toward each other

• acts when two objects rub against each other

• pulls two objects apart

You are trying to move a heavy box. How can you reduce friction when pushing the box?

• Put oil on the floor.

• Push with more force.

• Push with less force.

Which one has MORE gravity, the Earth or the MOON?

• The Earth

• The Moon