Question

A tennis ball is served 2.5 m above the ground at an angle of 5° above the horizontal direction with an initial speed of 30 m/s. a) When will it hit the ground? b) How far will it travel?

Answer 1

Use -2.5=30sin(5) t -1/2 (10) t2 to find t, and using answer of part (a) to find R= 30 cos(5) t;

Answer 2

ok thanks! And how do I solve -y = Vo sin (theta) t - (1/2) a t^2 for t?

Answer 3

it's a quadratic equation