Force and Motion

Front

What is the force that opposes motion between two surfaces in contact?

Back

Friction

Front

How can Samantha reduce the force needed to open a door that makes noise?

Back

Add lubrication to the door to make the pulling force smooth.

Front

What do we call forces that are equal and opposite?

Back

Balanced forces

Front

Why does a car use less force on a concrete road compared to a dirt road?

Back

The dirt road has more friction because the surface is not smooth.

Front

Which picture represents balanced forces?

Back

Picture B

Front

What is the definition of force?

Back

A push or pull on an object.

Front

What is motion?

Back

The change in position of an object over time.

Front

What is gravity?

Back

The force that pulls objects toward each other, especially toward the Earth.

Front

What is an example of unbalanced forces?

Back

A tug-of-war where one team pulls harder than the other.

Front

What happens when two forces are unbalanced?

Back

The object will accelerate in the direction of the stronger force.