Question

boy opens a nut by applying a force of 100N using a wrench of length 20cm. If he wants to open it by a force of 20N what should be length of wrench?​

Answer 1

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The torque is given as,

τ=F×l

By equating the torques on both sides, we get

F

1

×l

1

=F

2

×l

2

100×10=50×l

2

l

2

=20cm