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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Nitin Meel posted an Question
August 01, 2020 • 03:13 am
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30 points
30 points
- IIT JAM
- Physics (PH)
Motion of bodies connected by strings
what is meant by the reaction at the pulley and how it represent as R and it's relationship with T is given as R=2T. please explain it full.
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Ravi prakash yadav
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Reaction is nothing but normal reaction. Normal reaction acts when two bodies are in contact. In picture 2,R1 and R2 are simply normal reactions due to ground on both masses m1 and m2 respectively. See the attachment.
![cropped2369891032415175872.jpg]()
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Ruby negi Best Answer
A reaction force is just the opposition force of any force , it exists only in the presence of a action force . For eg : if u place a box of 5 kg (5*9.81=49.05N) on a floor, the floor exerts a reaction force of 49.05N on that box. Once you remove that box then that reaction force disappears.It is also called as normal force. so here , 2T is the reaction force to pulley when both the weight of the masses applies and in second figure, R1 and R2 are normal reaction to the weight...
see attachment