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Question

Aman and Sindhu are playing on a See-Saw. Aman is on one side sitting 3m away from the pivot. He weighs 450N. If Sindhu weighs 300N, how far away must she sit?


 
  1. 4.5 m
  2. 2 m
  3. 3.5 m
  4. 4 m


Solution

The correct option is A 4.5 m

Moment = Distance from pivot x Force

= 450 N x 3 m = 1350 Nm

Therefore, on the other side, the see-saw must have a moment of 1350Nm.

distance = 1350/300 = 4.5 m

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