Newtons Laws of Motion MS-PS2-2

Grade 8 - NGSS - CA

Forces that are equal but in opposite directions

Balanced force

Forces that are equal but in opposite directions. Balanced force. In simple terms, a balanced force means that an object will not change its motion it won't start moving, stop, or change direction unless acted upon by another force.

The push or pull exerted on an object

Force

The push or pull exerted on an object. Force. In simple terms, force is what makes an object move or stop moving.

The force that opposes motion between two surfaces that are touching

Friction

The force that opposes motion between two surfaces that are touching. Friction. Friction is a force that slows things down when they slide against each other.

The tendency of objects to resist any change in motion

Inertia

The tendency of objects to resist any change in motion. Inertia. Inertia means that objects won't start moving or stop moving unless a force is applied to them.

The amount of matter in an object

Mass

The amount of matter in an object. Mass. Mass is how much stuff is in an object and it doesn't change even if the object's shape or position does.

If the net force acting on an object is zero, the motion of the object does not change

Newtons first law of motion

If the net force acting on an object is zero, the motion of the object does not change. Newton's First Law of Motion. In simple terms, it means that an object will keep doing what it's doingstaying still or movingunless a force makes it change.

The acceleration of an object is the net force exerted on it divided by its mass

Newtons second law of motion

The acceleration of an object is the net force exerted on it divided by its mass. Newton's second law of motion. In simple terms, this means that the harder you push or pull something, the more it speeds up, depending on how heavy it is.

Forces acting on an object to cause a change in motion

Unbalanced force

Forces acting on an object to cause a change in motion. Unbalanced force. An unbalanced force occurs when different forces on an object do not cancel each other out, causing the object to move.