The main difference between the internal combustion engine and the diesel engine is that the diesel engine

a. has no connecting rods.
b. does not have a crankshaft.
c. has no ignition system.
d. does not utilize pistons.

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f