A large boulder is ejected vertically upward from a volcano withan initial speed of 40.0 m/s. Ignore air resistance. At what time is it moving at 20.0 m/s downward?
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A large boulder is ejected vertically upward from a volcano with
an initial speed of 40.0 m/s. Ignore air resistance. At what time
is it moving at 20.0 m/s downward?
Step by step
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