Question

A 250-kg crate is on a rough ramp, inclined at 30° above the horizontal. The coefficient of kinetic friction between the crate and ramp is 0.22. A horizontal force of 5000 N is applied to the crate, pushing it up the ramp. What is the acceleration of the crate?

Answer 1

this should be easy but for some reason I'm not getting the answer.

Answer 2

angles should all be 30 degrees not 40

Answer 3

does it make sense?

Answer 4

Not really, why would you subtract 5000sin(30) from the sum of the forces in the y direction and not add instead?

Answer 5

because it's pointing down