Question

a bullet is fired horizontally above a tunnel 6m high and strikes a target 100m away. Find the time if flight. (g=10ms-2)

Answer 1

We have

$$h=0.5gt^2$$

The time of flight:

$$t=\sqrt{\frac{2h}{g}}$$

$$t=\sqrt{\frac{2(6)}{10}}=1.1\ s$$