Refer `Q.107`. Find the displacement of bolt relative to `B` when it hits the flooe of `A`.

Options

A. 20 m
B. 24 m
C. 32 m
D. 36 m

Answer

B

Explanation

Displacement of bolt at `4 s` :
`S_b = 20 xx 4 - (1)/(2)10 (4)^2 = 0 m`
Displacement of ligt `B` at `4 s` :
`S_B = 10 xx 4 - (1)/(2) xx 2 xx (4)^2 = 24 m` downward
So displacement of bolt relative to `B` :
`S_(b//B) = 0 - 24 = -24 m`.