In 1959, physicists James Terrell and Roger Penrose (Nobel laureate in 2020) independently concluded that fast-moving objects should appear rotated. However, this effect has never been demonstrated.

The steeper the line, the greater the increase in speed. The area under the graph = the distance travelled. This is a speed-time graph for a car moving between two sets of traffic lights.

and decrease stress over time. First, let’s define the difference between flexibility and mobility. Flexibility is the amount of passive stretch in a muscle. Mobility is the range of motion at a ...