Summers are caused by
a. a combination of longer days and more direct rays from the sun.
b. less direct rays from the sun.
c. longer days and longer nights.
d. earth in its orbit moving closer to the sun.

Summers are caused combination of longer days and more direct rays from the sun.

Explanation:

Summers are caused combination of longer days and more direct rays from the sun.

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

need to see circuit to get time constant