Solving Block on Incline Physics Problem

[Maiia]

Can someone tell me if I'm doing this problem right?

Homework Statement

Here is the picture of the problem:
http://i210.photobucket.com/albums/bb23/Kyashii628/block.jpg

In my FBD, I have Fg pointing down, Fgy perpendicular to the incline and pointing down, Fgx parallel to incline pointing down the ramp (to left), kinetic friction pointing up the ramp (to right), and normal force pointing opposite from Fgy.

Homework Equations

Fnet= -ma
fk- Fgx= -ma
u(Fn)= -ma
u(345.0615986)= 648.9664808 -240
u= 1.182397583

 

[PhanthomJay]

Can someone tell me if I'm doing this problem right?

Homework Statement

Here is the picture of the problem:
http://i210.photobucket.com/albums/bb23/Kyashii628/block.jpg

In my FBD, I have Fg pointing down, Fgy perpendicular to the incline and pointing down, Fgx parallel to incline pointing down the ramp (to left), kinetic friction pointing up the ramp (to right), and normal force pointing opposite from Fgy.

good, but remember in your FBD, that once you resolve Fg into its x and y components, you should 'cross out' the Fg downward force.

Homework Equations

Fnet= -ma
fk- Fgx= -ma

good

u(Fn)= -ma

I'm sure you meant u(Fn) = fk

u(345.0615986)= 648.9664808 -240

you have your mg(sin theta)and mg(cos theta) reversed.

u= 1.182397583

Correct your error and your result should be fine.

 

[thomate1]

As a scientist, it is important to always double check your work and make sure that your calculations and equations are correct. It seems like you have a clear understanding of the problem and have correctly identified the forces acting on the block. However, it is difficult to determine if your calculations are correct without seeing your work and knowing the specific values for the forces involved. I would suggest checking your work and making sure that your equations are properly set up and that you are using the correct values for each force. It's always a good idea to ask for feedback or assistance from a teacher or classmate if you are unsure about your solution. Overall, keep up the good work and continue to approach problems in a scientific and methodical manner.