Answer both sections:
A) The motion of a piston in an auto engine is simple harmonic. If the piston travels back and forth over a total distance of 12 cm, and the piston has a mass of 1.8 kg, what is the maximum force acting on the piston when the engine is running at 4,800 rpm (revolutions per minute)? Round your answer to the nearest Newton. Enter the numerical answer only with no units.
B)
A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 cos (1.67t). The magnitude of the maximum acceleration (in m/s2) of the body is approximately
4.3
3.5
49
14
43
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