Force and Motion Review

Front

What is air resistance?

Back

friction in the air that slows things down

Front

Why do we need friction?

Back

It helps make objects go slower or stop.

Front

What does a curved line on a distance-time graph show?

Back

That the speed is changing.

Front

What is Friction?

Back

When 2 objects slide against each other

Front

What are EQUAL forces acting on an object in opposite directions that do not change the object's motion?

Back

Balanced Forces

Front

The force that two surfaces exert on each other when they rub against each other.

Back

Friction

Front

If an object does not move at all, what does that mean about the forces acting on the object?

Back

The forces are balanced.

Front

What will happen to the cart in the illustration?

Back

It will accelerate to the right.

Front

Unbalanced forces cause an object to _____?

Back

speed up, slow down, or change direction

Front

In order for a helicopter to hover in place, which statement must be true?

Back

The upward force is exactly the same as the downward force.