a rock is thrown straight upwards at 29.4m/s. How long does it take to reach its...
a rock is thrown straight upwards at 29.4m/s. How long does it take to reach its highest point and start falling back to the ground?
Homework Answers
Let us consider the upwards direction as positive and the downwards direction as negative.
Gravitational acceleration = g = -9.8 m/s2
Initial velocity of the rock = V1 = 29.4 m/s
Velocity of the rock at the highest point = V2 = 0 m/s
Time taken to reach the highest point = T
V2 = V1 + gT
0 = 29.4 + (-9.8)T
T = 3 sec
Time taken by the rock to reach the highest point and start falling back to the ground = 3 sec
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