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13.7 The equation for the position as a function of time for an oscillating spring is...

13.7 The equation for the position as a function of time for an oscillating spring is given by x  30cmcos 25t where x is in centimeters when t is in seconds. a) What is the frequency? b) If the mass on the spring is 1.2 kg, what is the spring constant of the spring? c) What is the position at t = 0.025 s? d) What is the position at t = 0.09 s ?

13.8 The maximum potential energy of a spring system (mass 15 kg, spring constant 850 N/m) is 6.5 J. a) What is the amplitude of the oscillation? b) What is the maximum speed?

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