a. Speed = 120m/20s = 6 m/s.
b. Speed = (70m-30m)/(10s-5s) = 8 m/s.
c. No, Jack did not travel at a constant speed:
30m/5s = 6 m/s after 5 s.
70m/10s = 7 m/s after 10 s.
Jack rides his skateboard a total distance of 120 m in 20 sec. What was his speed?
5 seconds after he started Jack was at a distance of 30 meters. 10 seconds after he started he was at a distance of 70 meters. What was Jack’s speed from time = 5 sec to time = 10 sec?
Did Jack travel at a constant speed? How do you know?
4 answers
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bleh
this was my hw and the answer for c or the last question that Henry posted doesn't make sense. well the answer does but not the explanation.
3 answers