Solving Dynamics Homework: Frictionless Ramp & 5.0kg Block

[StarMetroid]

Homework Statement

A flat-bed truck with a frictionless ramp accelerates forward.


/l (That 35 is the angle, and a 5kg block rests on the hypotenuse)
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- - /35 l
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The acceleration of the truck is suck that a 5.0kg block is stationary (relative to the ramp). If the rolling coefficient of friction is (mew=0.10) Find the force the engine is exerting on the 12000kg truck.

Homework Equations

F=ma, Ffriction=Fnormal*mew

The Attempt at a Solution

I found the block accelerates 9.8m/s^2 downwards and 13.98m/s^2 to the left, ant the total acceration is 17.1m/s^2

 

[StarMetroid]

I found the force of friction on the truck (12000*9.8*0.1) to be 11760Netwons.

 

[StarMetroid]

Please help me :'(