Finding work from an inclined plane, basic question

AI Thread Summary
To calculate the work done on a toy car accelerating down a ramp, the mass, acceleration, distance, and friction force must be considered. The user initially attempted to use the formula Ep=Fd but arrived at an incorrect value of 8.848 J. After realizing the importance of net force in the calculations, the correct answer of 13.3 J was determined. The discussion highlights the significance of accounting for all forces, including friction, when calculating work. Understanding the relationship between mass, acceleration, and net force is crucial for solving such physics problems.
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A 1.54 kg green toy car accelerates at 1.70 m/s² down a ramp 3.38 m long. If the force of friction acting on the toy car is 1.31 N, how much work is done on the toy car to get it to the bottom of the ramp?

Formulas:
Ep=mgh
W=fd
F=ma
a=gh/d
Fr=u*Fn

I know the acceleration, mass, and distance. Using the formulas Ep=Fd I can do 1.54 * 1.7 * 3.38 which is 8.848 J but it isn't correct. I also tried finding the height of the ramp by using the formula a= gh/d and by getting height i can use the formula Ep= mgh but still 8.84. The right answer is 13.3 J but i don't see how. Help? please as soon as possible thanks guys!
 
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Never mind totally forgot about net force! Problem solved (:
 

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