# Force & Newton's Laws Vocab

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### Force

A push or pull on an object.

### Net Force

The combination of all the forces on an object.

### Balanced Forces

They cancel each other out and do not change an object's motion.

### Unbalanced Forces

The motion of an object changes.

### Friction

Force that resists sliding between two touching surfaces or through air or water.

### Kinetic Friction

Friction that occurs when two objects in contact slide past each other.

### Gravity

Attractive force between two objects; depends on the mass of the objects and the distance between them.

### Weight

Gravitational force.

### Air Resistance

A form of friction that acts to slow down any object moving through the air.

### Drag

A force that opposes motion of an object when an object moves through a fluid.

### Newton's 1st Law of Motion

An object will remain at rest or move with constant speed unless a force is applied.

### Newton's 2nd Law of Motion

Connects force, acceleration, and mass; it explains that an object acted upon by a force will accelerate in the direction of the force; acceleration equals new force divided by mass.

### Newto's 3rd Law of Motion

States that forces always act in equal but opposite pairs; for every action there is an equal and opposite reaction.

### Applied Force

Force applied to an object.

Support force.

Example: