Question #127064

In an electric shaver, the blade moves back and forth over a distance of 2.0mm in simple harmonic

motion, with a frequency 120Hz. Find (a) the amplitude, (b) the maximum blade speed and (c) the

magnitude of the maximum acceleration of blade.

motion, with a frequency 120Hz. Find (a) the amplitude, (b) the maximum blade speed and (c) the

magnitude of the maximum acceleration of blade.

Expert's answer

(a) "A=L\/2=2\/2=1mm"

(b) "v=\\omega A=2\\pi fA=2\\cdot3.14\\cdot120\\cdot0.001=0.75m\/s"

(c) "a=\\omega^2A=(2\\pi f)^2A=(2\\cdot3.14\\cdot 120)^2\\cdot 0.001=568m\/s^2"

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