Forces

Front

What is a force?

Back

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

Front

What are contact forces?

Back

Contact forces are forces that occur when two objects are in physical contact with each other.

Front

What are noncontact forces?

Back

Noncontact forces are forces that act on an object without physical contact, such as gravitational force.

Front

What is gravitational force?

Back

Gravitational force is a noncontact force of attraction between two objects, like the Earth and an object.

Front

What happens when two equal forces act in opposite directions?

Back

The object does not move because the forces cancel each other out.

Front

What happens when two unequal forces act on an object?

Back

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

Front

What is net force?

Back

Net force is the total force acting on an object after all the forces are combined.

Front

How does mass affect motion?

Back

More mass means more force is needed to change the motion of an object.

Front

What is friction?

Back

Friction is a force that opposes motion between two surfaces in contact.

Front

What is the effect of adding mass to an object being pushed?

Back

If more mass is added, the motion of the object will decrease if the same force is applied.