Ball thrown upwards at velocity of 21.3 m/s what time will ball reach highest point

Recall that

At its highest point, the ball will have 0 vertical velocity, so that

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.