Force and Motion - 3rd Grade

Front

What is a force?

Back

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

Front

What is motion?

Back

Motion is the change in position of an object over time.

Front

What is gravity?

Back

Gravity is the force that pulls objects toward each other, like the Earth pulling us down.

Front

What is friction?

Back

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

Front

What is a balanced force?

Back

Balanced forces are equal in size and opposite in direction, causing no change in motion.

Front

What is an unbalanced force?

Back

Unbalanced forces are not equal, causing a change in motion.

Front

What happens when a force acts on an object?

Back

When a force acts on an object, it can start moving, stop moving, or change direction.

Front

What is momentum?

Back

Momentum is the quantity of motion an object has, depending on its mass and speed.

Front

What is an example of an unbalanced force?

Back

A person pushing a car to get it moving is an example of an unbalanced force.

Front

What is an example of a balanced force?

Back

Two people pushing a box in opposite directions with equal strength is an example of a balanced force.