A cyclist speeds up from 3 m/s to 7 m/s in 8 seconds.
a. What is its change in velocity

cant see to find the answer sorry :( i tried :( good luck !! youll do great <333

Explanation:

sorry ;( best of luck

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explanation:

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.