# Science: Speed, Velocity and Acceleration

- Average Speed: distance travelled per unit of time (m/s)
- Velocity: displacement per unit of time (m/s)
- Average Speed is SCALAR, while velocity is a VECTOR

## Distance-Speed-Time Triangles

- Usage:
- Average Speed \(=\) Distance \(\div\) Time
- Distance \(=\) Average Speed \(\times\) Time
- Time \(=\) Distance \(\div\) Average Speed

## Acceleration

- Acceleration is the rate at which an object’s velocity CHANGES
- Acceleration is measured in \(m/s^2\) (metres per second squared)
- Acceleration can be found by dividing the applied force by the mass of the object
- \(a = F/m\)

- Acceleration is a VECTOR quantity.