1) An object moves 18 m in the first
3 s, 22 m in the next 3 s and 14 m in
the last 3 s. What is its average
speed?
(Ans: 6 m/s)
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Answer:
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Answer:
Total distance = 18 + 22 + 14 = 54 m
Total Time = 3 + 3 + 3 = 9 seconds
Rate (speed) = distance / time = 54 / 9 = 6 m/s
NB = The average of the averages is incorrect. For example, 2000 m/hr. for a hour plus 1000 m/hr. for a minute does not average 1500 m/hr.
Explanation:
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