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Why do we prefer a wrench …

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Why do we prefer a wrench with long arm to open ascrew

Posted by Ashutosh Kumar 7 years, 2 months ago

CBSE > Class 11 > Physics

3 answers

Amayra Singh 7 years, 2 months ago

This is the case of rotational motion so the torque is the applying force. And torque =F*r so by increasing radius of rotational motion we can increase torque and to increase radius we need a longer wrench. So longer wrench increases force (torque) and produce more turning effect and screw will easily open.

Priya Dharshini ☺☺ 7 years, 2 months ago

As one knows TORQUE = R cross F => F = torque/R As torque required to open a nut is constant. So F is inversely proportional to R. Hence if load arm is long we require less force to open.if there is any better ans let me know

Miya Jan 7 years, 2 months ago

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