Force and Motion

Front

What is 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 inertia?

Back

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

Front

What is speed?

Back

Speed is how fast an object is moving, calculated as distance divided by time.

Front

What is acceleration?

Back

Acceleration is the rate at which an object changes its speed or direction.

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 Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.