Our physics expert picks his top-five equations, plus a scheme to supply US power needs with a bucket of baseballs. Thanks, Einstein!

We now use the following equation to calculate the acceleration: \(a=\frac{(v-u)}{t}\) Watch this video to see the correct procedure for carrying out this investigation.

There are various methods to measure acceleration due to gravity. At Higher level all rely on one of the equations of motion. The measurements required will depend on the equation used.

Instead, they strongly suggest that there is local acceleration near 5.5 Re, and that radial diffusion actually transports electrons away from the Earth, beyond the radiation belts. In contrast to ...