What is mean by the vertical intercepts in optics?

c=

Explanation:

using mirror formula

we know

where u is object distance

           v is image distance

           f is focal length of the mirror

from the above equation we can write

comparing equation with

             y= m x + c

c comes out to be  

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