Question

Explain how you will determine experimentally the
position of centre of gravity for a triangular lamina
(or a triangular piece of card board).​

Answer 1

Answer:

Make holes A,B and C near it's every edge .Fix a nail through one of it's edge.

So that the object can move freely.

The object will come to rest with it's centre of gravity,just vertically below the nail.

Vertcal line A can be located using a plumbline hung from the nail.

Mark the line on that behind the plumbline.

Repeat this process by supporting the card from B.

The line B should intersect with line A at G point.

Similarly draw another line from point C .

It should also pass from G.

It will be found that vertical lines from A,B and C have a common point G.

THIS POINT IS THE CENTRE OF GRAVITY.

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