You read a primary source and a secondary source that discuss the same experiment. there is a difference in the conclusion made by these two sources. which should you trust more, and why?

C.) The primary source because it is written by the scientist who did the work.

Explanation:

The correct answer for ApX!!!

i think the answer is a, hope this is right, that would be my best guess.

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