Q.

A body projected at an angle with the horizontal has a range 300 m. If the time of flight is 6 s, then the horizontal component of velocity is

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a

30 ms-1

b

50 ms-1

c

40 ms-1

d

45 ms-1

answer is B.

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Detailed Solution

Horizontal range, R = u cos θ TGiven that R = 300 m, T = 6 sec.Therefore, horizontal component of velocity,ucos⁡θ=RT=3006=50ms−1Hence, correct answer is (2).
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