Time to Slide Down Inclined Plane

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∘=‌

1

2

,cos‌30∘=‌

√3

2

]