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in Physics by (50.2k points)

A spring is stretched by 3cm when a load of 5.4 x 106 dyne is suspended from it. Work done will be-

(1) 8.1 × 106 J

(2) 8 × 106 J

(3) 8.0 × 106 ergs

(4) 8.1 ×106 ergs

1 Answer

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Best answer

Correct Answer is: (4) 8.1 ×106 ergs

W = 1/2 x load x elongation

W = 1/2 × 5.4 × 106 × 3

W = 8.1 × 106 ergs

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