If you perform 10 joules of work lifting a 10-n box from the floor to a shelf, how high is the shelf?
a. 1 m
b. 2 m
c. 10 m
d. 100 m

A. 1 m

Explanation:

The work done to lift the box is equal to the product between the force applied and the distance covered by the box:

In this case, the force applied is equal to the weight of the box (F=10 N), and we know that the work done is W=10 J, so we can rearrange the formula to calculate the distance d:

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