### Balancing 1

Meg and Mo need to hang their marbles so that they balance. Use the interactivity to experiment and find out what they need to do.

### Balancing 2

Meg and Mo still need to hang their marbles so that they balance, but this time the constraints are different. Use the interactivity to experiment and find out what they need to do.

# Balancing 3

##### Age 11 to 14 Challenge Level:

Mo has gone home now, but she left her pouch of marbles with Meg.

Meg has hung Mo's pouch at a fixed point on the right of the balance, and is experimenting with her pouch of marbles on the left.

Meg has discovered that if she puts 8 marbles in her pouch when it is 100cm from the centre, then it balances with Mo's pouch.
Use the interactivity to explore this further.

Full Screen Version
If you can see this message Flash may not be working in your browser
Please see http://nrich.maths.org/techhelp/#flash to enable it.

Fill in the table below to show how she can make it balance with different distances and different numbers of marbles.

 Distance from the centre Number of marbles 100cm 8 50cm 25cm 40cm

Explore this further.

Without using the interactivity, can you now work out how Meg would need to alter her pouch to balance it with Mo's?

 Distance from the centre Number of marbles 200cm 20cm 25 x cm x

Try to explain how you worked it out.