How do you find the efficiency of a motorized machine given the work input and output?

Output / input * 100 (Eg input-120 output-60 60/120=0.5 0.5*100=50 efficiency=50%)

Apossible long term health effects of stress would be work

Well the magnitude of its acceleration related to that car starts with the oil change like when you have to change the oil in your car you have to make sure that your precious car is starting really propley and very well