# Physics Chapter 1 Force Exam Flash Cards

## 24 terms

### Force

A push or a pull.

### Balanced Force

Equal in size or magnitude AND Opposite in
direction.

### Unbalanced Force

Unequal in size/magnitude, OR In SAME direction, AND Causes a CHANGE in the object's motion.

### Net Force

The combination of all the forces that act on an object

### Gravity

The force of attraction between ALL objects.

### Centripetal Force

Center seeking - pulls toward the center of rotation (circle).

### Inertia

The tendency of an object to resist change in motion.

### Friction

A force that opposes the motion of an object.

### Static Friction

Force that must be overcome to start an object moving.

### Sliding Friction

Solid surfaces slide over each other.

### Rolling Friction

Object rolls over a surface.

### Fluid Friction

Objects moving through a fluid - water, air, etc.

### Lubricant

Materials that reduce friction.

### Air Resistance

The frictional force that opposes the downward motion of objects falling through the atmosphere.

### Velocity

The speed in a given direction

### Terminal Velocity

the velocity reached when the upward force of air resistance becomes equal to the downward pull of gravity and forces becomes balanced so it doesn't go any faster than it is.

### Weight Force

The pull of gravity on the mass of an object

### Magnetic Force

The pull of objects to a magnet

### Wind Force

The push on an object, such as a kite

### Waterfall Force

Gravity pulling down on water