Question

A particle is projected with velocity 100 mis at 30°. Time of flight is

• A. 5 s
• B. 10 s
• C. 15 s
• D. 7.5 s

Answer 1

Answer: (B)

As, $T=\frac{2u\sin \theta }{g}$
Here, $u=100m{s}^{-1},\theta =30^{\circ },g=10m{s}^{-2}$
$\therefore T=\frac{2\times 100\times \sin 30^{\circ }}{10}=10s$