SOLUTION: A stone id dropped out of a window near the top of a building, what its velocity when it has fallen 4.0 m? A car starting from rest accelerates at a constant rate of 3.0 m/s2 for

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Question 1081336: A stone id dropped out of a window near the top of a building, what its velocity when it has fallen 4.0 m?
A car starting from rest accelerates at a constant rate of 3.0 m/s2 for 8.0 seconds. How far does the car travel during this time?
Answer by ikleyn(52794) About Me  (Show Source):
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1.  A stone id dropped out of a window near the top of a building, what its velocity when it has fallen 4.0 m?

    v = sqrt%282%2Ag%2Ah%29 = sqrt%282%2A9.81%2A4%29 = sqrt%2878.48%29 = 8.86 m/s (meters per second)


2.  A car starting from rest accelerates at a constant rate of 3.0 m/s2 for 8.0 seconds. How far does the car travel during this time?

    S = %28at%5E2%29%2F2 = %283%2A8%5E2%29%2F2 = 96 m/s = 345.6 km/h.