A truck starts from rest and accelerates uniformly at `2.0ms^(-2)` . At t = 10s, a stone is dropped by a person standing on the top of the trunk (6m high from the ground). What are the (a) velocity and (b) acceleration of the stone at t = 11s? (Neglect air resistance)

Options

A. 22.4 m/s at an angle of `tan^(-1) 1/2` with the horizontal `10m//s^2` vertically downwards
B. 22.4 m/s at an angle of `tan^(-1) 1/2` with the vertical, `10m//s^2` vertically downwards
C. `10m//s^2` at an angle of `tan^(-1) 1/2` with the horizontal, 22.4m/s vertically downwards
D. `10m//s^2` at an angle of `tan^(-1) 1/2` with the horizontal 22.4 m/s vertically downwards

Answer

A