A negative gradient shows the rate of “slowing down” or deceleration. Velocity-time graphs show velocity on the vertical axis. Acceleration is still represented by the gradient. Key fact The gradient ...

With gold medals in three sprinting events at three Olympic Games, Usain Bolt has written himself into the record books as arguably the fastest human of all time. But just how fast is the Jamaican ...

The width of the two taller parts of the card are measured and the card is attached to a trolley. We then place a light gate at the bottom of the slope and release the trolley. The light gate is ...