Front

What is a force?

Back

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

Front

What are the two main types of forces?

Back

Contact forces and non-contact forces.

Front

What is gravity?

Back

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

Front

What does mass refer to?

Back

Mass is the amount of matter in an object, usually measured in kilograms.

Front

What is the relationship between mass and gravity?

Back

The strength of gravity between two objects depends on their mass and the distance between them.

Front

What is air resistance?

Back

Air resistance is a force that opposes the motion of an object through the air.

Front

What is friction?

Back

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

Front

What is a balanced force?

Back

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

Front

What is an unbalanced force?

Back

Unbalanced forces are not equal and can cause an object to start moving, stop moving, or change direction.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion.