PHYSICS 140 FINAL EXAM WITH 100% CORRECT ANSWER (VERIFIED ANSWERS) | LATEST UPDATE | ALREADY GRADED A+

An object hangs motionless from a spring. When the object is pulled down, the sum of the elastic potential energy of the spring and the gravitational potential energy of the object and Earth ANSWER: increases because the increase in elastic potential energy is greater than decrease in gravitational potential energy What kind of damping do you want shock absorbers to have? ANSWER: Critically damped Damping has two main effect which are: ANSWER: - It decreases the amplitude of oscillations (energy is dissipated) - It decreases the frequency of oscillations (period is increased) Resonance ANSWER: Occurs when the frequency of forced vibrations on an object matches the object's natural frequency, and a dramatic increase in amplitude results. Maximal displacement from equilibrium (x=±A) corresponds to: ANSWER: maximal acceleration, maximal force, and maximal potential energy. A mass is oscillating back and forth on a spring and there is no friction. At what point is the total energy of the system a maximum? ANSWER: Same everywhere A mass-on-a-spring oscillates with an amplitude A. If you double the amplitude, the energy of the system becomes ANSWER: 4 times as big. TME = kA^2/2 A pebble is removed from a box in SMH at the maximum distance from the equilibrium point. Which quantities remain the same: frequency, period, amplitude, max KE, max speed? ANSWER: amplitude and max KE.