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

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Sir, when stone is released from balloon then once it will go up and then it will have free fall motion so we have to deal them as 2 independent situations or directly take as a one situation i am not sure with this concept please guide

2 years ago by aryan mishra

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What is significance of negative time sir..

4 years ago by Hritik Kumar

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Sir why don't we find the time of stone going stone in upward direction to that same point and then 100m downward and then add them all, What I had done is t1=2u/g =4sec 100=0 (1/2×10t2²) t2=_/(20) Hence total time 4 _/20 Answer is not matching please tell me where I am wrong

5 years ago by Ritik Raj

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sir when we need to take reference and when not. Like you took in the example as positive x axis and negative x axis.

6 years ago by Dharamjeet Singh

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sir if the ball goes up,the height will increase,but you wrote h=100??????

6 years ago by Dharamjeet Singh

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H is not total distance it is displacement

6 years ago by Munishwar Sharma

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how can height be negative?

7 years ago by PRACHI DEV

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yes u r right height is never -ve but here its not height its displacement which is -ve(as downward)

7 years ago by Yashwant Dhote

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sir why h is taken negative there

7 years ago by sagar

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u=20 m/s g=-10 m/s h=-100 For first part of motion(Going up due to initial velocity and coming down due to gravity) Time=(2*u)/g=(2*20)/10= 4 seconds. Now for coming down v=u+at 0=20+(-10*t) 10*t=20 t=2 Therefore total time taken: 6 seconds Why is this answer not valid?

7 years ago by Rohit Shiju

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The velocity at 100m is not becoming 0.so we can not apply that direct result

7 years ago by Shah Darshan Jagdishbhai

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sir it should be considered as x axis or y axis. tell me sir plz

8 years ago by surya

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

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