posted by May .
i saw this question from physics book, can someone please help me solve this.. thank you..
A man pulls a 500 Newton block up a plane inclined 300 with the horizontal with a force of 300 Newton parallel to the plane. What net force tends to pull the block up the plane?
the part of the weight the block going down the plane is mgSinTheta.
So the pushing force is opposing that "sliding down the plane weight force".
Net force up: 300-500sinTheta