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A particle of mass M is joined to very heavy body by a light string passing over a light pulley .The bodies are free to move the total downward force on the pulley is

A particle of mass M is joined to very heavy body by a light string passing over a light pulley .The bodies are free to move the total downward force on the pulley is 

Grade:11

1 Answers

Arun
25750 Points
5 years ago
The heavy body will fall because of acceleration due to gravity. The acceleration of the lighter body will be 'g' in upward direction. 
Taking the equilibrium of the small body 
 T - mg = ma 
but a = g 
Therefore: 
T - mg = mg 
T = 2mg 
Reaction at the pulley 
2T = 4mg
 
Regards
Arun
 

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