Answer to Question #15770 in Mechanics | Relativity for d4

Question #15770
If you throw a ball straight upward at a speed of 22 m/s, how long will it take to reach zero speed?
1
Expert's answer
2012-10-04T08:40:50-0400
The velocity of the ball turns to zero at the top point of the trajectory. Let's denote the time elapsed to reach the highest point by T. Then

22[m/s] - 9.8[m/s²]*T = 0 ==> T = 22[m/s] / 9.8[m/s²] ≈ 2.24 s.

So, it will take about 2.24 seconds the ball to reach zero speed.



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