A high jumper weighing 700 newtons jumps over a bar 2.0 meters high.
What work does the high jumper do?

1400 J

Explanation: Work is the product of force and distance.

W = Fd

= 700 N ( 2.0 m)

= 1400 J

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.

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