Atennis player standing 12.6m from the net hits the ball at 3.00 degrees above the horizontal. to clear the net, the ball must rise at least 0.330m. if the ball just clears the net at the apex of its trajectory, how fast was the ball moving when it left the racket? show wr =)

48.6 m/s

Explanation:

height, h = 0.33 m

angle of projection, θ = 3°

Let the velocity of projection is u.

Use the formula for the maximum height raised

u = 48.6 m/s

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .