A wooden block is dropped from the top of a cliff 100 m high. Simultaneously a bullet of mass 10 g is fired from the foot of the cliff upwards with a velocity of `100 ms^(-1)`. The bullet and wooden block will meet each other after a time

Options

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

Explanation

`barA=5hati+7hatj-3hatk`
`barB=2hati+2hatj-chatk`
`barA.barB=0`
`implies(5xx2)+(7xx2)+(3xxc)=0`
`10+14++3c=0`
`implies3c=-24`
`:.c=-8`