### High Jumping

How high can a high jumper jump? How can a high jumper jump higher without jumping higher? Read on...

### Out in Space

A space craft is ten thousand kilometres from the centre of the Earth moving away at 10 km per second. At what distance will it have half that speed?

### Earth Orbit

Follow in the steps of Newton and find the path that the earth follows around the sun.

# Dangerous Driver?

##### Stage: 5 Challenge Level:
What equations of mechanics do you know which relate to acceleration?

Don't forget units.

Don't forget to consider carefully the validity of any modelling assumptions, such as that of constant acceleration.