Speed and Velocity

Question	Answer
Speed and velocity is how fast something is moving. It is measured in m/s.	The difference between the two is that velocity must be accompanied by a distance (E.g. 10 m/s north) where speed doesn't.
The equation to work out speed is: Speed = Distance/Time S = D/T	Alternate equations to work out distance and time are: Distance = Speed x Time (D=S x T) Time = Distance/Speed (T=D/S)
Acceleration is how fast the velocity/speed is changing. This is measured using: Acceleration = Change in velocity/Time	Change in velocity is calculated like so: Final velocity - initial velocity (v-u) Therefore the symbol equation for acceleration is: A= (v-u)/t
On Distance time graphs, Gradient = Speed. To work out the gradient, you take the no. on the vertical axis and divide it by the no. on the horizontal line.	The steeper the graph, the faster the thing in question is moving. A steeping curve means it's speeding up, while a leveling-off curve means it's slowing down.

Resource summary

	Created by KNiGHTS over 10 years ago