Question

19. A body is dropped from a height H. The time taken to * cover second half of the journey is 2H o 2H 1 (4) ve yg x rype. 32-1)

NEET/Medical Exams

Physics

Solution

4.0 (1 ratings)

If it takes time "T" to reach the ground then, ( H=0.5 g T^{2} ) ( mathrm{T}=sqrt{(} 2 mathrm{H} / mathrm{g}) ) If it takes time "t" to travel first half of the journey then, ( 0.5 H=0.5 g t^{2} ) ( mathrm{H}=mathrm{gt}^{2} ) ( mathrm{t}=sqrt{(} mathrm{H} / mathrm{g}) ) Time taken to cover second half of the journey is ( =T-t ) ( =sqrt{(} 2 mathrm{H} / mathrm{g})-sqrt{(} mathrm{H} / mathrm{g}) ) ( =sqrt{(} mathrm{H} / mathrm{g}) times(sqrt{(} 2)-1) )