Explain whether each of the following components of engine friction would be expected to depend on (1) crankshaft rotational speed N, (2) mean piston speed S p , (3) or both of these variables....

Explain whether each of the following components of engine friction would be expected to depend on (1) crankshaft rotational speed N, (2) mean piston speed S_p, (3) or both of these variables. Crankshaft journal bearings, connecting rod bearings, valve train, piston rings, piston skirt, water pump, fan, valve flow loss (resistance to flow through the inlet and exhaust valves).