An inclined plane making an angle of
30∘ with the horizontal is placed in a uniform horizontal electric field
200N∕C as shown in the figure. A body of mass
1kg and charge
5mC is allowed to slide down from rest at a height of
1m. If the coefficient of friction is
0.2, find the time taken by the body to reach the bottom.
[ Take,
g=9.8m∕s2,sin30∘=,cos30∘=]