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Mass of an object up inclined plain

  • Thread starter Paulbird20
  • Start date
53
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applied all the force FR=1008N that I could to the (massless, unstretchable) rope in an effort to pull Brisket into the trailer, up the ramp that formed an angle of 24.0° with the ground. Brisket moved down the ramp with an acceleration of magnitude 0.29m/s2. With this information, and assuming the ramp is frictionless, what is Brisket's mass (in kg)?

What i have done so far is Fn = mg cos (angle) and that is 1008/ 9.8cos 24(degrees)= 112.59 kg but it is not correct can anyone direct me into the right direction

Much appreciated
 
211
0
You're trying to pull the object UP the ramp, but it's moving DOWN. Draw a free body diagram!
 
The equation should be
mg*sin(24)(downward force) - FR = ma
 

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