Assume that a friend hands you a heavy book to hold as he turns the combination lock on his locker. which of you does more work?

None of us is doing work

Explanation:

None of us is undergoing work because it is said that for work to be done a force applied to a body must cause the body to move through a "distance". According to both me and my friend, we are both at a particular position (not covering any distance) and as such work has not been done by any of us not until we leave our position of rest to cover a particular distance.

it may be wrong but i think its a

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards