# Weight

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

## Weight

When you think of weight ( $$WT$$ ) it is probably associated with mass. But weight is not mass. Weight is a force on an object accelerated by gravity.  Weight is a vector quantity having magnitude and direction, some of these include acceleration, displacement, drag, force, lift, momentum, thrust, torque, and velocity .

### Weight formula

$$W = mg \;$$

Where:

$$W$$ = weight

$$m$$ = mass

$$g$$ = gravitational acceleration

Solve for:

$$m = \frac {W} {g}$$

$$g = \frac {W} {m}$$

## Specific Weight

Specific weight is the weight per unit volume of a substance.

### Specific Weight formula

$$\gamma = \rho g$$

Where:

$$\gamma$$ (Greek symbol gamma) = specific weight

$$\rho$$ (Greek symbol rho) = density

$$g$$ = gravitational acceleration

Tags: Equations for Weight