Physics
11.01.2020 03:34
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In an electric shaver, the blade moves back and forth over a distance of 2.0 mm
In an electric shaver, the blade moves back and forth over a distance of 2.0 mm in simple harmonic motion, with frequency 124 hz. find (a) the amplitude, (b) the maximum blade speed, and (c) the magnitude of the maximum blade acceleration.
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nicollexo21
4,8(59 marks)
(a) A = 1 mm
(b) 
(c) ![a_{max}=606.4 m/s^{2}/tex]Explanation:Distance moved back and forth = 2 mm Frequency, f = 124 HzSo, amplitude is the half of the distance traveled back and forth. (a) So, amplitude, A = 1 mm(b) Angular frequency, ω = 2 π f = 2 x 3.14 x 124 = 778.72 rad/s The formula for the maximum speed is given by [tex]V_{max}=\omega \times A](/tpl/images/0224/1314/97e24.png)
(c) The formula for the maximum acceleration is given by
[tex]a_{max}=606.4 m/s^{2}/tex]
HannaTheGurls
5,0(16 marks)
Explanation:
F = ma
m = F/a
m = 107.2/1.6 = 67 kg
so Naoki's mass must be the total mass - mass of the bike
so her mass is 67 - 9 = 58 kg...B
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