Distance, speed and acceleration – WJEC Velocity-time graphs of motion. ... From 10 to 20 seconds this is the area of the rectangle, 10 s × 40 m/s = 400 m.

Here I am calling the width of this rectangle dt instead of Δt to emphasize that it is a very small time interval. The other big difference is that the velocity is not constant and it also ...

This ancient Babylonian cuneiform tablet describes a surprisingly modern method to track the path of Jupiter. Babylonian astronomers plotted a 60-day portion of Jupiter’s wandering path across the sky ...