Why do we use a wrench of long arm to unscrew a unit tightly fitted to

1.	Why do we use a wrench of long arm to unscrew a unit tightly fitted to a bolt?
Answer» Solution :Unscrewing a nut means a rotation about the axis of the nut. Application of a higher MOMENT of force will FACILITATE this rotation. If the force applied remains the same, the moment of force is higher when the arm is longer. So we USE a wrench of long arm to unscrew a nut tightly fitted to a BOLT.

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