Force, Friction, Gravity, and Mass

Front

What is force?

Back

A push or pull that can change the motion of an object.

Front

What is mass?

Back

The amount of matter in an object, usually measured in grams or kilograms.

Front

What is gravity?

Back

A force that pulls objects toward each other, especially the pull of the Earth on objects.

Front

What is friction?

Back

A force that opposes motion between two surfaces that are in contact.

Front

How does mass affect motion?

Back

Objects with less mass require less force to move, making them easier to accelerate.

Front

What happens to friction when a surface is wet?

Back

Friction decreases, making surfaces slippery.

Front

What can increase the speed of a falling object?

Back

Reducing air resistance, such as by using a smaller surface area.

Front

What is the relationship between gravity and weight?

Back

Weight is the force of gravity acting on an object's mass.

Front

How can you reduce friction?

Back

By using lubricants, smoothing surfaces, or reducing the contact area.

Front

What is the effect of gravity on a thrown ball?

Back

Gravity pulls the ball back down to the ground after it is thrown.