A ball is dropped off a very tall canyon ledge. Gravity accelerates the ball downwards at 9.8 m/s2. How fast is the ball traveling after 3.5 seconds?

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.

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