Hailstorms are observed to strike the surface of a frozen lakein a direction making an angle 30^(@) to the vertical and to rebound at an angle of 45^(@) to the vertical. Assuming the contact to be, smooth find the coefficient of restitution.

Hailstorms are observed to strike the surface of a frozen lakein a dir

1.	Hailstorms are observed to strike the surface of a frozen lakein a direction making an angle 30^(@) to the vertical and to rebound at an angle of 45^(@) to the vertical. Assuming the contact to be, smooth find the coefficient of restitution.
Answer» Solution :we know that `tan alpha = (tan THETA)/( e) , tan 45 ^(@) = (tan 30^(@))/( 3) implies e = (1)/(SQRT3) =0.577`