Velocity-time graphs show how the velocity (or speed) of a moving object changes with time. These graphs also show if the object is moving at a constant speed or accelerating, decelerating, or still.

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 ...

GRAPHS show how Omicron is fuelling the fastest ever Covid acceleration in London. The strain now accounts for more cases than Delta, despite only being detected for the first time three weeks ago.