Question

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

• A. 1.5 s
• B. 1 s
• C. 3s
• D. 2s

Answer 1

Answer: (B)

1 s

Answer 2

The time of flight $=\frac{2u\sin \theta }{g}$ $=\frac{2\times 9.8\times \sin 30{}^\circ }{9.8}=1\,s$