A body is projected upwards with a certain velocity and it is found that when in its ascent it is 58.8m from the ground, it takes 4 sec, to return to the same point again. what is the velocity of projection and whole height ascended?

the answer is b

explanation:

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

365.25 earth days are in the year of a light year