A man of mass 60 kg is standing on a weighing machine (2) placed on ground. Another weighing machine (1) of mass 5 kg is placed over man's head. A block of mass 50kg is put on the weighing machine (1). Calculate the readings of weighing machines (1) and (2) As shown in figure.

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Posted by pallavi on 2024-11-08 08:28:21 |

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Sol:. 

Weighing machine records the normal reaction acting on it

  From free body diagram of 50 kg block

 

N1 = mblock × g  = 50 × 10 = 500N

Hencethe reading of weighing machine (1) will be 500N

(50 + 5 + 60) ×10= 1150N

Fromfreebody diagram

  N2= 1150N

  Hencethe reading of weighing machine (2) will be 1150N

Go!