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  1.  
    2. 1. Can I still treat a railway carriage as a point object if it is moving with jerks between stations? 2. Can I still treat a monkey as a point object if a man is cycling not smoothly?
    2 years ago by Jaijith

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  2.  
    3. Sir, at t = 10 sec, Sn = 0.5*(19) = 9.5. After t = 10, we will have v = 0 1*10 = 10 ms-1 Therefore, should the graph not "jump" up and start from 10 m/s and then continue like that uniformly?
    4 years ago by Harshvardhan Manish Singhee

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  3.  
    4. Sir can I say that this graph is of a charged particle - electromagnetic plate system? The plate is suddenly switched on, its electric field strength increases and then subsequently decreases?
    4 years ago by Harshvardhan Manish Singhee

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  4.  
    5. Sir, in this question why you have assumed that the distance "l" while going in the direction of cyclist and opposite to the direction of cyclist is equal. Clearly it is not mentioned in question so full data is not given. I found this in many other questions to then how I came to know where do I need to assumption and where not?
    6 years ago by Harshit Kumar Dubey

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  5.  
    6. Sir option c and d we had not understand properly... Y they not consider as point mass plz explain with example
    6 years ago by undefined

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  6.  
    7. At 4:13 i think initial speed of the ball which is 49 5 should be 54 m/s instead of 53m/s. Correct me if i am wrong.
    8 years ago by

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  7.  
    8. If t = 8 sec. for first stone and t = 10 sec. for second stone then why sir has not taken t1 and t2 i.e. different variables for both time period and also in last where he's comparing relative motion of 2 systems in y2-y1 there also both t for 1 and 2 written just as t and not as t1 and t2 . Why ?
    8 years ago by

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  8.  
    9. Sir are there lectures for neet questions solving??this is only ncert right
    8 years ago by mohd thanikunnel

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  9.  
    10. b and c samaj ni aaye.. Sir aap thoda sa detail ma samjhaayenge .. Aur point mass ka concept clear kare sir g
    8 years ago by musharaf mushtaq

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  10.  
    11. In ncert ans is given 1250
    8 years ago by Yashwant Dhote

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