(a) with what speed must a ball be thrown vertically from ground level to rise to a maximum height of 52 m? (b) how long will it be in the air?

Explanation:

Maximum height reached by the ball, s = 52 m

Let u is the initial speed of the ball and v is the final speed of the ball, v = 0 because at maximum height the final speed goes to 0. We need to find u.

(a) The third equation of motion as :

Here, a = -g

u = 31.92 m/s

(b) Let t is the time when the ball is in air. It is given by :

t = 3.25 seconds

Hence, this is the required solution.                                                                  

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

an energy transformation flow diagram is shown

where is it ?