Brianna weighs 425 n. she climbs a flight of stairs to a height of 8 m. it takes her 6 seconds.
how much work does brianna do when she climbs the stairs?
a.
71 j
b.
2550 j
c.
3400 j
d.
53 j

So we want to know how much work does Brianna do while climbing the stairs to a height h=8m while she weighs F=425N and in t=6s. So work W is defined as Force F times distance h or: W=F*h. Since Brianna has to use the force that is equal to her own weight during her climbing the calculation is this: W=F*h=425N * 8m=3400J. The work she does is W=3400 J.

Wish i knew this to !