1.A positively-charged object with a mass of 0.136 kg oscillates at the end of a

Question

1.A positively-charged object with a mass of 0.136 kg oscillates at the end of a spring, generating ELF (extremely low frequency) radio waves that have a wavelength of 4.05 x 107 m. The frequency of these radio waves is the same as the frequency at which the object oscillates. What is the spring constant of the spring?


2. You walk at an angle of ? = 50° toward a plane mirror, as in the drawing. Your walking velocity has a magnitude of 1.0 m/s. What is the velocity of your image relative to you (magnitude and direction)?

Explanation / Answer

mass m = 0.136 kg wavelength = 4.05 *10^7 m speed of radio waves c = 3* 10^ 8 m / s frequency of the wave f = c /                                      = 7.407 Hz Frequency of the object f ' = f                   (1/2) [k/ m] = 7.407                    [k/m] = 2*7.407                               = 46.54                       k / m = 2166.16 spring constant of the spring k = m*2166.16                                                = 294.6 N / m (2). figure is not visiable

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