The question is in the picture

e) 120m/s

Explanation:

When the ball reaches its highest point, its velocity becomes zero, meaning

.

where is the initial velocity.

Solving for we get

which is the time it takes the ball to reach the highest point.

Now, after the ball has reached its highest point, it turns around and falls downwards. After time since it had reached the highest point, the ball has traveled downwards and the velocity it has gained is

,

and we are told that this is twice the initial velocity ; therefore,

which gives

Thus, the total time taken to reach velocity is

This , we are told, is 36 seconds; therefore,

and solving for we get:

which from the options given is choice e.

battery with hi vtge high val resist in series

unbalanced force

explanation: