Force and Motion Review

A force is a ____or a ____ that causes an object to move, stop, or change direction.

• push or pull

• acceleration or velocity

• speed or slow down

One force that

causes an object to slow down by rubbing up against another object is

called _______.

• acceleration

• velocity

• friction

• inertia

The more textured a surface is, the more ________

it will have on the object moving over the surface.

• speed

• velocity

• intertia

• friction

Another natural

force that pulls objects toward the earth is called ________.

• gravity

• inertia

• velocity

• acceleration

We

need both of these kinds of forces because all objects have

________, which is a resistance to change in motion.

• push

• pull

• inertia

• speed

The speed and direction that an object is going in is called

___________.

• acceleration

• velocity

• speed

• inertia

When forces can change the speed or

direction that an object is moving in, it is called ____________.

• velocity

• pull

• inertia

• acceleration

An example of acceleration is if a ball was thrown hard against a wall, it will pick up ____ once it hits the wall to bounce back.

• inertia

• friction

• speed

• gravity

A ball is pushed down a ramp.

• Law 1-Inertia

• Law 2-Acceleration

• Law 3-Action and Reaction

Two fifth graders accidentally run into each other on the playground. They both fall backwards onto the ground.

• Law 1-Inertia

• Law 2-Acceleration

• Law 3-Action and Reaction