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posted by Phy help! on Wednesday, December 1, 2010 at 5:02am.

The pistons in an internal combustion engine undergo a motion that is approximately simple harmonic. If the amplitude of motion is 3.8cm , and the engine runs at 1500rpm , find the maximum acceleration of the pistons. Find their maximum speed.

First, convert rpm to angular velocity w, in radians/s w = 1500*(2 pi)/60 = 157.1 rad/s If A is the amplitude, Maximum speed = A w Maximum acceleration = A w^2 Put A in meters/s to get speed in m/s and acceleration in m/s^2

937.85m.s

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