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High School/JEE/NEET/IPhO Physics | 17-19 Yrs

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I had a doubt that how did Sir derive the first equation? He said that we can use virtual work method, and that total work done be tension on block is zero. But then Sir wrote Work as Product of Tension and Acceleration. I am unable to understand the concept behind it.

2 years ago by

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Superb and useful

2 years ago by

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So,sir if we are assuming the direction of acceleration,then we have to take care of the direction of movement of other connected pullies also?As in the case of this question,for first block,direction is downward,then that of second block should be in upward direction and the third one again in downward direction?

6 years ago by Manasi Singh

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i need help from you.. should i see advanced illustrations just after the concept videos or after completing all chapters concept videos??what are your views??please help fast

7 years ago by Sandal Agarwal

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in which video virtual work concept has been covered??(as said by sir in the video)(and why did you took sum of T as 0)

7 years ago by Sandal Agarwal

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why work done by tension is considerd as zero

7 years ago by M NAGARAJU

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Net Work done by tension force is considered to be zero because this is an internal force and we know that only eternal force is reponsible for work. You will lean this concept by watching the next video archive

7 years ago by Abhinav kumar Yadav

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Sir is any more easy way to do this or its compulsory to solve equations even in the exam??If this is then how solve these equations more quickly??

8 years ago by Advait Kulkarni

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This is the shortest way of solving such questions... if you solve by observation, it will take more time in analyzing such constrained relations...

8 years ago by Physics Galaxy

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why did we multiply the tensions and the accns

9 years ago by Ratnesh Phadke

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We are considering the work done by tension on all blocks equal to zero i.e. sum(T.s)=0 and on differentiating twice we get the relation sum(T.a) =0

9 years ago by Physics Galaxy

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High School/JEE/NEET/IPhO Physics | 17-19 Yrs

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