A 68.0-kg bungee jumper is standing on a tall platform (h0 46.0 m), as indicated in Figure 10.35. The bungee cord has an unstrained length of L0 9.00 m and, when stretched, behaves like an ideal spring with a spring constant of k 66.0 N/m. The jumper falls from rest, and it is assumed that the only forces acting on him are his weight and, for the latter part of the descent, the elastic force of the bungee cord. What is his speed (it is not zero) when he is at the following heights above the water (see the drawing): (a) hA 37.0 m and (b) hB 15.0 m? Con

Physics 2 for Engineering Week 14 Beats 2 sound waves with slightly different frequencies Tbeat= T a b (T -Tb) and f beat= 1 / Tbeat= f a b Tbeatis time it takes to go from minimum to minimum or maximum to maximum Tbeat= nT =a(n-1) T b Doppler Effect f heard by observer depends on relative motion of the source with respect to the observer f’ = f (vsound+- v observer/ (vsound+- v source Depends on relative motion of source and observer Moving towards each other – higher frequency Moving away from each other – lower frequency f is frequency of sound, and f’ is frequency of sound heard by the observer Source at rest, observer moves towards f’ = f (v s