Solved: Use the workenergy theorem to solve each of these

Chapter 6, Problem 6.21

(choose chapter or problem)

Use the workenergy theorem to solve each of these problems. You can use Newtons laws to check your answers. Neglect air resistance in all cases. (a) A branch falls from the top of a 95.0-m-tall redwood tree, starting from rest. How fast is it moving when it reaches the ground? (b) A volcano ejects a boulder directly upward 525 m into the air. How fast was the boulder moving just as it left the volcano?

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