A wooden block is dropped from the top of a cliff 100m high and simultaneously a bullet of mass 10 g is fired from the foot of the cliff upwards with a velocity of `100 m//s`. The bullet and wooden block will meet each other after a time:

Options

A. 10 s
B. 0.5 s
C. 1 s
D. 7 s

Answer

C

Explanation

For block `h = (1)/(2) g t^(2)`
For bullet `100 - h 100 t - (1)/(2) g t^(2)`
`t = 1 sec`