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NEET Class neet Answered

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Asked by pandasubhanit | 07 Apr, 2024, 07:42: AM
answered-by-expert Expert Answer

Let u be intial projection velocity with initial projection angle 30o .

vertical h  displacement at time t is

img

If vertical displacements are equal at t= 1 s and at t = 3s , then we have

img

( u sin30) ( 3 -1 ) = (1/2) × 10 × [ 9 - 1 ]

hence we get u = 40 m/s

Answered by Thiyagarajan K | 07 Apr, 2024, 10:31: AM
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