Aperson is lifting a bag of groceries with a uniform force of 75.0 n upward for 2.50 s. they raised the bag 1.50 m to place on a table from the floor. what power did they use?

45 W

Explanation:

First of all, we need to find the work done by the person to lift the bag. The work done is given by

where

F = 75.0 N is the force applied

d = 1.50 m is the displacement of the bag

Substituting numbers into the formula,

Now we can find the power used, which is given by

where

t = 2.50 s is the time taken

Again, using W=112.5 J, we find

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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