# terms 4 as physics

a simple summerised document of possible definitions and explanations to common questions

- Created by: MAXDEE IZY
- Created on: 05-12-11 19:56

First 167 words of the document:

Physics terms for my as paper revision in January

Scalar quantities.

These are quanties that have got magnitude but no direction.

Examples

Distance

Power

Pressure

temperature

Speed

Frequency

Scalar quantities can be added and subtracted like normal numbers but they should have the

same units. Multiplying or dividing scalar quantities always gives a scalar quantity.

Vector quantities:

These have both magnitude and direction

Examples.

Weight, velocity, displacement, acceleration, force, momentum, electric field, magnetic field.

Displacement

This is a distance moved in a certain direction.

Equations to calculate displacement.

S= (U+V) X t (time) U is the initial velocity , V is the final velocity.

2

S = Vt ½ at2

S = Ut + ½ at2

Velocity

Equations

V = U + at

V2 = U + 2 as

Acceleration

This refers to change in velocity over a given time.

Equation a= VU /2 OR a = F/m

## Comments

No comments have yet been made