A small block of mass `'m'` is kept on the smooth inclined plane of angle `37^@)`, placed in an elevator going upward with acceleration `a=g/3`, as shown in the figure. A horizontal electric field `E` perpendicular to the left and right vertical wall of the elevator exists. The charge on the block is `+q`. Find the time (in sec) when the block collide with the vertical wall. (take `g=10m//s^(2)` and `(qE)/m=25m//s^(2)`)

Answer

1

Explanation

F.B.D of block
`a_("net")=12m//s^(2)` , up the incline plane
`S="ut"+1/2"gt"^(2)`
`3.6xx5/3=1/2xx12xxt^(2)`
`impliest=1`sec