Question

Newton's Laws help? Question in comments :D

Answer 1

It's just 17, not 18 :)

Answer 2

@ganeshie8 @hartnn

Answer 3

Part a)

By newtons third law we know that the tension in the rope must have a force equal in magnitude pulling on the box since the box is stationary on the platform. This means we need to find the magnitude of the force in the direction opposite the rope. This force is caused by
gravity.

Answer 4

We need to find F using the sine trigonometric function and by finding the weight of the box:
\[F=wsin(\theta)=mgsin(\theta)\]

Answer 5

so 8.5sin30?

Answer 6

thats it

Answer 7

for part B we find the y-component of the weight