Force and Motion - 3rd Grade

Front

What is a force?

Back

A force is a push or pull on an object.

Front

What is an unbalanced force?

Back

An unbalanced force is when two forces acting on an object are not equal, causing the object to move.

Front

What is a balanced force?

Back

A balanced force is when two forces acting on an object are equal, causing the object to stay still or move at a constant speed.

Front

What does it mean to pull something?

Back

To pull something means to move it towards yourself.

Front

What does it mean to push something?

Back

To push something means to move it away from yourself.

Front

Give an example of balanced forces.

Back

An example of balanced forces is when two people are playing tug-of-war and they are pulling with equal strength.

Front

Give an example of unbalanced forces.

Back

An example of unbalanced forces is when one person pulls harder than the other in a tug-of-war, causing the rope to move.

Front

What is friction?

Back

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

Front

What happens when forces are balanced?

Back

When forces are balanced, the object does not change its motion.

Front

What happens when forces are unbalanced?

Back

When forces are unbalanced, the object will start to move or change its motion.