An athlete can exercise by making mechanical waves in ropes. What is the medium of these waves?
A. Energy
B. The rope
C. The athlete
D. Air

It would be B. The Rope

Explanation:

I say this because the rope is transferring energy from one location to another. Now, I could be totally wrong on this but I think this is right lol.

The answer is B the rope.

Hope this helps <3 ;)

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