The number of complete cycles in a given period of time is the of a periodic motion.

frequency

Explanation:

Wavelength Distance between a point on one wave and the same point on the next cycle of the wave.Hope it helps:)

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

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.