Consider a graphical representation (fig 15.3) of simple harmonic motion as described mathematically in equation 15.6. When the particle is at point A on the graph, what can you say about its position and velocity? a. The position and velocity are both positive. b. The position and velocity both are negative. c. The position is positive and the velocity is zero. d. The position is negative, and the velocity is zero. e. The position is positive, and the velocity is negative. f. The position is negative, and the velocity is positive.

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Problem 2:  Special sections of roadway are sometimes paved with “rumble strips” to alert inattentive drivers. In a particular case the grooves are spaced L = 0.26 m apart and the depth of each groove is d = 0.35 cm. As you drive over this rumble strip, the tires of your car oscillate about their equilibrium positions with a frequency of f = 68.6Hz. Refer to the figure, which is not drawn to scale.  Part (b) Find the vertical position of the tire, in centimeters, at the time t = 1.85 s. Part (c) With your tire oscillating at a frequency of f = 68.6 Hz and the distance between grooves L = 0.26 m, what is the speed of your car, in kilometers per hour?

The max displacement from the equilibrium of any oscillator can be doubled by doubling? a. Only the initial speed b. Only the initial displacement C. The initial displacement and the initial speed d. Halving the initial speed while doubling the initial displacement.