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An object is protected with a velocity of 100m-1 at an angle of 60o to...

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Question 589
A
5.0s
B
8.7s
C
10.0s
D
17.3s
E
20.0s
Explanation
t = \(\frac{T}{2} = \frac{1}{2} = \frac{2u \sin \theta}{g} = \frac{100 \times \sin 60}{10}\)

10 sin60 = 10 x 0.8660

= 8.7

Correct option: B

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