The diagram below (Fig 1.36) Shows a uniform bar supported at the midd

1.	The diagram below (Fig 1.36) Shows a uniform bar supported at the middle point O. A weight of 40 gf is placed at a distance 40 cm to the left of the point O. How can you balance the bar with a weight of 80 gf?
Answer» Anticlockwise moment = 40gf × 40 cm Clockwise moment = 80 gf × d cm From the principle of moments, Anticlockwise moment = Clockwise moment 40 gf × 40 cm = 80 gf × d So, d = 40gf x 40/80 = 20cm to the righte of point O.

The diagram below (Fig 1.36) Shows a uniform bar supported at the middle point O. A weight of 40 gf is placed at a distance 40 cm to the left of the point O. How can you balance the bar with a weight of 80 gf?

Answer»

Anticlockwise moment = 40gf × 40 cm

Clockwise moment = 80 gf × d cm

From the principle of moments,

Anticlockwise moment = Clockwise moment

40 gf × 40 cm = 80 gf × d

So, d = 40gf x 40/80 = 20cm to the righte of point O.