A box that weighs 5.00 x 10^2 N is sliding down a ramp at a constant speed. The angle the ramp makes with the horizontal is 30°. What is the coefficient of
friction between the box and the ramp?

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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.

v 154.9= 0.9 length length s little over 154.9cm