Problem 14.74 At what displacement are the kinetic and potential energies equal? x= 0.139 m An object with mass 0.160 kg is acted on by an elastic restoring force with force constant 10.0 N/m. The object is set into oscillation with an initial potential energy of 0.130 J and an initial kinetic energy of 6.30×10 J Submit My Answers Give Up Correct Significant Figures Feedback: Your answer .1389 m was either rounded differently or used a different number of significant figures than required for this part. Part D What is the value of the phase angle φ if the initial velocity is positive and the initial displacement is negative? rad Submit My Answers Give Up Incorrect; Try Again; 4 attempts remaining