If a rock is thrown vertically upward from the surface of Mars with velocity of 20 m/s, its height (in meters) after t s

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If A Rock Is Thrown Vertically Upward From The Surface Of Mars With Velocity Of 20 M S Its Height In Meters After T S 1 (60.09 KiB) Viewed 61 times

If a rock is thrown vertically upward from the surface of Mars with velocity of 20 m/s, its height (in meters) after t seconds is h = 20t - 1.86t². (a) What is the velocity (in m/s) of the rock after 2 s? 12.56 m/s (b) What is the velocity (in m/s) of the rock when its height is 30 m on its way up? On its way down? (Round your answers to two decimal places.) X m/s 9.32 -9.32 X m/s up down