Asked by susan
A man leans over the edge of a cliff and throws a rock upward at 4.9 m/s. Neglecting air resistance, two seconds later the rock's speed is what?
Answers
Answered by
drwls
Subtract g*t = 19.6 m/s^2 from +4.9 m/s.
The speed will be downward at that time.
Speed is a magnitude, and is always considered positive. So the answer is 14.7 m/s
The speed will be downward at that time.
Speed is a magnitude, and is always considered positive. So the answer is 14.7 m/s
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