1. The problem statement, all variables and given/known data Rather than lifting a 225kg motorcycle 60cm on a truck, Samantha uses a 4m plank as an incline and only requires 345N to push up the ramp 2. Relevant equations 3. The attempt at a solution To find work output, i did .6M X 2250N giving me 1350 J To find work input, i did 345N X 4M giving me 1380J I divided 1350J by 1380J giving me 97.8 % efficiency For mechanical advantage i said 6.5, by dividing 2250N by 345N Can somone correct this, or tell me if I got this right, thank you!!