Q.

To open a door easily, the handle should be fixed –

A. near the hinges
B. away from mid-point opposite to hinges
C. in the middle
D. None of these
Answer» D. None of these
Explanation: Since Torque = force x distance, to open a door easily, the handle should be fixed at the greatest distance from the hinges. If we pull with same force on a handle that is 2 feet away from the hinges, we will provide twice the torque, so it will be twice as easy to open.Q.50) Dioptere is the unit of –
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