Horizontal force on frictionless ramp

[phunphysics2]

A 100 N box is being pushed with a horizontal force F at 30 degrees on a frictionless ramp. Determine F and N (normal force). I got about 57.74 and about 115 for the second part (I don't know if it is right)




Fcos(theta) -mgsin(theta)=0 for part A


N-Fsin(theta)-mgcos(theta)=0 for part B

Please let me know what you get.

Thank you for your help! Any and all answers are much appreciated!

 

[BruceW]

yep, your answers look good to me :)

 

[phunphysics2]

Thanks!

 

[SammyS]

A 100 N box is being pushed with a horizontal force F at 30 degrees on a frictionless ramp. Determine F and N (normal force). I got about 57.74 and about 115 for the second part (I don't know if it is right)

Fcos(theta) -mgsin(theta)=0 for part A

N-Fsin(theta)-mgcos(theta)=0 for part B

Please let me know what you get.

Thank you for your help! Any and all answers are much appreciated!

There is not enough information to answer this question.

Is the box stationary?

Is it moving at a constant velocity?

Is it accelerating? If so, at what rate?

 

[BruceW]

haha, yes, I was going to say that. I assumed that the box was moving at constant speed, and I got the same answer as him, so I guess he just forgot to write that in the first post.