Asked by Anonymous

A ball is dropped from a high building. Using the approximate value of g = 10 m/s2, find the change in velocity between the fourth and seventh second of its flight
Answered by bobpursley
find v(7) : v(7)=10*7=70
find v(4) : v(4)=10*4=40

calculate the change.
Answered by Mina
30 is the change
Answered by Anonymous
30m/s
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