Question

You perform 556 J of work lifting a box to a height of 1.3m. How much force did you use to lift the box?

Answer 1

Answer:

The work is given 556 J. Here work is performed horizontally so your distance d=1.3 m

W=F.d

F=W/d =556/1.3 = 427.69 N

Explanation:

Answer 2

The work is equal to the product between the force applied and the distance covered by the box:
$W=Fd$
In our problem, W=556 J, and d=1.3 m (the box is lifted to a height of 1.3 m, so it covered 1.3 m from its initial point). Therefore we can find the force applied to lift the box:
$F= \frac{W}{d}= \frac{556 J}{1.3 m}=427.7 N$