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
Show Answer
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{.} $
