Hi and thanks in advance for any help!
The questions are way to long and require to much to drawing to post so ill summarize but if you have the Green Kaplan MCAT High Yield Problem solving book i am refering to pgs16-18
In the first problem on pg 16 they have a block on an inclined plane it is sliding down the plane and there is kinetic friction... when they draw the free body diagram they resolve the W vector into X and y components and such that Wx = mgsin() and Wy = mg cos() <-- I am good with this.
However in the next problem they a similar inclined plane but this time they have 2 blocks connect by a string on the inclined plane and a mass hanging over a massless pulley. the mass hanging over is heavier then the mass on the plane and therefore it is accelerating...
However when they draw the free-body digram for the masses on the plane there they only resolve the W vector into x component Wx=mgcos() and use the resultant of the vectors (simply W=mg instead of W=mgcos()).....
WHY DO YOU NOT RESOLVE THIS INTO X AND Y COMPONENTS? WHAT CONCEPT AM I MISSING HERE?
Thanks again for any help!!!!!!!!!!!!
The questions are way to long and require to much to drawing to post so ill summarize but if you have the Green Kaplan MCAT High Yield Problem solving book i am refering to pgs16-18
In the first problem on pg 16 they have a block on an inclined plane it is sliding down the plane and there is kinetic friction... when they draw the free body diagram they resolve the W vector into X and y components and such that Wx = mgsin() and Wy = mg cos() <-- I am good with this.
However in the next problem they a similar inclined plane but this time they have 2 blocks connect by a string on the inclined plane and a mass hanging over a massless pulley. the mass hanging over is heavier then the mass on the plane and therefore it is accelerating...
However when they draw the free-body digram for the masses on the plane there they only resolve the W vector into x component Wx=mgcos() and use the resultant of the vectors (simply W=mg instead of W=mgcos()).....
WHY DO YOU NOT RESOLVE THIS INTO X AND Y COMPONENTS? WHAT CONCEPT AM I MISSING HERE?
Thanks again for any help!!!!!!!!!!!!
