You did 130 j of work lifting a 100 n backpack. how high did you lift the backpack?

1.3 m

Explanation:

The work done in lifting the backpack is equal to the change in gravitational potential energy of the backpack, so:

where

W = 100 N is the weight of the backpack

is the change in heigth of the object

In this problem, we know that

so we can re-arrange the equation to find the change in height of the backpack:

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table