Kinematics Question 577

Question: A body is thrown with a velocity of $ 9.8m{{s}^{-1}} $ making an angle of $ 30{}^\circ $ with the horizontal. It will hit the ground after a time

Options:

A) 3.0 s

B)2.0 s

C) 1.5 s

D)1 s

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Answer:

Correct Answer: D

Solution:

[d] Time of flight = $ \frac{2\text{u sin}\theta }{\text{g}} $

$ =\frac{2\times 9.8\times \sin 30{}^\circ }{9.8}=2\times \frac{1}{2}=1\text{ sec}\text{.} $



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