Getting the balance right

video

vocabul

ary

pivotn. the central

point, pin, or shaft on which a mechanism turns or oscillates

see-saw

n.

a long board that children play on. The board is balanced on a central point.

level

adj. having a flat, horizontal surface

balancen.a state wher

e things are of equal weight or force

distance

n.  the amount of space between two places

MOMENTS

MOMENTS

Forces can make objects turn if there is a pivot. Think of a playground see-saw. The pivot is the thing in the middle of it.

When no-one is on the see-saw it is level, but it tips up if someone gets onto one end. Turning forces around a pivot

are called moments.

It is possible to balance the see-saw again if someone else gets onto the

other end and sits in the correct place. This is because the turning forces are balanced. We say the

moments are equal and opposite.

To work out a moment, we need to know two things:

1. the distance from the pivot that the force is applied.

2. the size of the force applied

This is the equation for working out a moment:

moment = force × distance

Getting the balance

right

You will get these following things,,,- string- chopsticks- things for

hanging - tape

Use those things to make mobiles that balance and hang properly

thanks