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प्रश्न
The diagram below shows a uniform bar supported at the middle point O. A weight of 40 gf is placed at a distance of 40 cm to the left of the point O. How can you balance the bar with a weight of 80 gf?
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उत्तर
W1 = 40 gf
W2 = 80 gf
d = 40 cm
d1 = ?
W1 × d = W2 × d1
40 × 40 = 80 × d1
d1 = `(40 × 40)/80 = 20` cm
By placing the weight 80 gf at a distance of 20 cm to the right of the point O.
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