Contact and Noncontact Forces

Front

What is a contact force?

Back

A contact force is a force that requires physical contact between two objects to occur, such as friction or tension.

Front

What is a non-contact force?

Back

A non-contact force is a force that acts on an object without physical contact, such as gravity or magnetism.

Front

Give an example of a contact force.

Back

Friction is an example of a contact force.

Front

Give an example of a non-contact force.

Back

Gravity is an example of a non-contact force.

Front

What unit is force measured in?

Back

Force is measured in newtons (N).

Front

What happens when two objects exert forces on each other?

Back

They can either push away from each other (repel) or pull towards each other (attract).

Front

What is friction?

Back

Friction is a contact force that opposes the motion of an object when it is in contact with another surface.

Front

What is the effect of gravity on objects?

Back

Gravity pulls objects towards the center of the Earth, causing them to fall.

Front

True or False: A ball falling to the ground is an example of a non-contact force.

Back

True.

Front

When lifting an object, what type of force is being applied?

Back

A contact force.