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A uniform plank of wood of length 5 m is pivoted at its centre. A girl of mass 32 kg sits at one end of...

      

A uniform plank of wood of length 5 m is pivoted at its centre. A girl of mass 32 kg sits at one end of the plank. Determine how far from the pivot a boy of mass 40 kg should sit in order to balance the plank.

  

Answers


samuel
- Sum of clockwise moments = sum of anticlockwise moments.

40x = 32x 2.5

x=32 x 2.5/40 = 2.0m
lemass answered the question on January 21, 2019 at 08:25


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