Question

I do not get part D?

An object with mass 0.200 kg is acted on by an elastic restoring force with force constant 10.8 N/m. The object is set into oscillation with an initial potential energy of 0.150 J and an initial kinetic energy of 7.00 times10^-2 J. Significant Figures Feedback: Your answer 0.142 m was either rounded differently or used a different number of significant figures than required for this part. What is the value of the phase angle phi if the initial velocity is positive and the initial displacement is negative? Recall that the inverse tangent (arctan) function returns a value between - pi/2 and pi/2, but there is another angle (pi radians larger) that has the same tangent. Look at the signs of the initial displacement and velocity to determine which of these two is the correct phase angle.

Answer 1

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