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

a.   mass number from atomic number

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