Physics 1029A/B Lecture 5: January 17

VectorA has a magnitude of 33 units and points in the positivey-direction. When vector B is added to , the resultant vector A+Bpoints in the negative y-direction with a magnitude of 17 units.Find the magnitude ofB ?

A 69 kg human sprinter can accelerate from rest to 12 m/s in 3.3 s. During the same interval, a 33 kg greyhound can accelerate from rest to 17 m/s. Compute (a) the change in kinetic energy and (b) the average power output for each.

A capacitor of 3 Farads, 6 Farads, 11 Farads, and 17 Farads are connected in series to a connected of 33 volt battery. One of these capacitors has the most stored energy, Umost, and one has the least stored energy, Uleast, . Determine the difference in stored energy between them: Umost - Uleast in Joules.