A ball is thrown upward with a speed and direction such that it reaches a maximum height of 16.0 m above the point it was released. At its maximum height it has a speed of 18.0 m/s. With what speed was the ball released?
A) 25.3 m/s
B) 22.2 m/s
C) 33.0 m/s
D) 29.2 m/s
E) 36.9 m/s

Question

Quizplus · Accepted Answer

At the maximum height, the ball's velocity is zero. So, using the equation of motion, v^2 = u^2 + 2as,we have,0 = u^2 - 2(9.8)(16)=> u^2 = 313.6=> u = 17.7 m/s.

A Ball Is Thrown Upward with a Speed and Direction