Answer:
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
[tex]W=Fd[/tex]
where
F = 75.0 N is the force applied
d = 1.50 m is the displacement of the bag
Substituting numbers into the formula,
[tex]W=(75.0 N)(1.5 m)=112.5 J[/tex]
Now we can find the power used, which is given by
[tex]P=\frac{W}{t}[/tex]
where
t = 2.50 s is the time taken
Again, using W=112.5 J, we find
[tex]P=\frac{112.5 J}{2.5 s}=45 W[/tex]
