# Force

Force is the push or pull of an object resulting in a change from rest or motion. So when you apply force to an object the velocity changes, the change in velocity is acceleration. Force is a vector quantity having magnitude and direction, some of these include acceleration, displacement, drag, lift, momentum, thrust, torque, velocity, and weight.

### Contact Forces

- Frictional force
- Tensional force
- Normal force
- Air Resistance force
- Applied force
- Spring force

### Action at a distance Forces

- Gravitational force
- Electrical force
- Magnetic force

### Force Formula

\(\large{ F = ma }\)

\(\large{ F = p A }\)

Where:

\(\large{ F }\) = force

\(\large{ a }\) = acceleration

\(\large{ A }\) = area

\(\large{ m }\) = mass

\(\large{ p }\) = pressure

## Applied Force

Applied force ( \(F_a\) ) can come from different types of forces, one of them could be Newton's Second Law. There really is no one formula.

## Centrifugal Force

Centrifugal force is when a force pushes away from the center of a circle, but this does not really exist. When an object travels in a circle, the object always wants to go straight, but the centripetal force keeps the object traveling along an axis of rotation.

## Concurrent Force

All of the forces act at the same point.

## General Three-dimensional Force

All other combinations of nonconcurrent, nonparallel and noncoplanar forces.

## Parallel Force

All the forces are parallel (not necessarily in the same direction)

Tags: Equations for Force