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

Answer» 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.<br>As one knowsTORQUE = R cross F=> F = torque/RAs 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<br>Eisjsj the c chij tu UC fb


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