Force and Motion

What is a Force?

• A push or a pull.

• A jump or a sleep.

When you

KICK A BALL

you do a push or a pull?

• push

• pull

When you

pick up a book from your desk

you do a push or a pull?

• push

• pull

The picture is an example of a(n)

• unbalanced force

• balanced force

• moving target

________ is the force on Earth that is always acting on objects (pulling them down).

• gravity

• friction

• evidence

• magnetism

The picture is an example of a(n)

• balanced force

• unbalanced force

• moving track

Select all the things that forces can do:

• Speed up a moving object

• Slow down a moving object

• Change the direction of a moving object

• Make an object at rest start moving

Tony’s father is pushing him on a swing. The swing moves back and forth in a regular pattern. What is likely to happen if his father pushes the swing harder?

• The swing will slow down.

• The swing will move to the left.

• The swing will go higher.

• The swing will stop.

Which of these objects are exerting contact forces on each other? Choose 2 examples.

• a bat hitting a baseball

• Earth in orbit around the sun

• a bicycle leaning against a wall

• a leaf falling to the ground

A bike is parked on the sidewalk. The kickstand keeps the bike from falling over. What can you tell about the kickstand?

• The sidewalk and the kickstand are not in contact.

• The sidewalk and the kickstand are exerting forces on each other

• The bike is not leaning on the kickstand.

• The kickstand and the bike are unbalanced forces.