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A particle is thrown upward. It …

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A particle is thrown upward. It attains a height h after 5 second and again after 9 second when it comes back. What is the speed of the particle at a height h?

Posted by Himanshi Singh 2 years, 8 months ago

CBSE > Class 11 > Physics

1 answers

E.Shivani Nair 2 years, 8 months ago

Given that, Velocity v=um/s Time taken to reach at maximum height t1=5s Now, Total time taken to reach same point t2=9s Particle to reach its maximum height will be half of total time =4.5s Now, the particle returns to the same point in time t=9−5=4s Now, the time at height is t=4.5−4 t=0.5s So, the velocity at height h v=u−gt 0=u−9.8×0.5 u=4.9m/s Hence, the speed of the particle at height is 4.9 m/s

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