a cyclist is going from mile mark 20 to mile mark 50 in 30 mins. what is the cyclist speed ? can we know the cyclist acceleration ? why? what is the cyclists speed min to second ?
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Expert's answer
2012-10-26T10:11:50-0400
The average speed of a cyclist is
S = (50[mile]-20[mile])/30[min] = 1[mile/min] = 1609.344/60[m/s] = 26.8224[m/s].
We can not find the cyclist's acceleration cause we don't have enough information about the changes of his speed.
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