![Lunar Leaper](/sites/default/files/styles/medium/public/thumbnails/content-99-10-15plus6-icon.jpg?itok=r2au4Ho2)
problem
Favourite
Lunar leaper
Gravity on the Moon is about 1/6th that on the Earth. A
pole-vaulter 2 metres tall can clear a 5 metres pole on the Earth.
How high a pole could he clear on the Moon?
![Powerfully fast](/sites/default/files/styles/medium/public/thumbnails/content-id-6370-icon.jpg?itok=CjN59zSt)
![High Jumping](/sites/default/files/styles/medium/public/thumbnails/content-id-2742-icon.jpg?itok=R6BWE3bA)
article
High jumping
How high can a high jumper jump? How can a high jumper jump higher without jumping higher? Read on...
![Go spaceship go](/sites/default/files/styles/medium/public/thumbnails/content-id-6416-icon.gif?itok=xU57cDIO)
problem
Favourite
Go spaceship go
Show that even a very powerful spaceship would eventually run out
of overtaking power
![Light weights](/sites/default/files/styles/medium/public/thumbnails/content-id-7356-icon.png?itok=FBAlSrdz)
![Escape from planet Earth](/sites/default/files/styles/medium/public/thumbnails/content-id-5952-icon.jpg?itok=gV76XkAH)
problem
Favourite
Escape from planet earth
How fast would you have to throw a ball upwards so that it would
never land?
![Placeholder: several colourful numbers](/themes/nrich/images/nrich_small_placeholder.png)
![The ultra particle](/sites/default/files/styles/medium/public/thumbnails/content-id-6559-icon.jpg?itok=P3LO-xbR)
problem
The ultra particle
Explore the energy of this incredibly energetic particle which struck Earth on October 15th 1991
![Sweeping Satellite](/sites/default/files/styles/medium/public/thumbnails/content-id-6626-icon.png?itok=e8t1KWHj)