First slide

Rectilinear Motion

Question

A body is projected vertically upwards with a speed of 15m/s. Then the time of flight of the body is………. $(g = 10 m / s^{2})$

Easy

A

1s
B

2s
C

3s
D

4s

Solution

Given that initial speed $u = 15 m / s$
$∴$ Time of flight $T = \frac{2 u}{g}$
$= \frac{2 \times 15}{10} = 3 s$

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