Average velocity of Mike Phelps swimming 100 m race in the 50 m long pool (2 laps) is approximately equal to A. 0 m/s
B. 1 m/s
C. 2 m/s
D. 4 m/s

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.