Speed and Velocity

Speed and Velocity both measure how fast you are going and are both measured in m/s
1. Speed is more simple than velocity, this is due to not having a direction to travel in
  1. Velocity must have a direction, for example 40mph north
Velocity acceleration and displacement are called vector quantities, this is because they have a magnitude (size) and a direction
Formula for Speed= distance/time
In the exam when you are asked to work out the velocity, you have to write a direction because you will only get half marks, velocity is half speed, half direction
Acceleration is how quickly velocity is changing
1. Velocity can change by a change in the speed, direction or both
Formula for Acceleration= Change in Velocity/Time taken
1. To work out the 'change in velocity' you need to take the final velocity away from the initial velocity of the object
2. Acceleration is measured in m/s2 (squared)

Resource summary

	Created by milliewernyj17 almost 11 years ago