Answer to Question #17000 in Mechanics | Relativity for Johan
Question #17000
The first 3 seconds the car moves with 6m/s speed other 2 seconds the car moves with 14m/s. What is the average speed of the car?
Expert's answer
The car moved the distance
d = 3s * 6m/s + 2s * 14m/s = 18+28 = 46
m
during
t = 3s + 2s = 5s
Hence, by definition, the average speed
is
v = total_distance / total_time = d/t = 46/5 = 9.2 m/s
d = 3s * 6m/s + 2s * 14m/s = 18+28 = 46
m
during
t = 3s + 2s = 5s
Hence, by definition, the average speed
is
v = total_distance / total_time = d/t = 46/5 = 9.2 m/s
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I'm quite satisfied! I have confidence in your work. It resulted in full 100 percent scores, not once but multiple times!
#181135 on Oct 2017
#181135 on Oct 2017 
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