Sunee is competing in 5 km (5000m) race. She runs 4902 m at a B velocity of 4.3m/s when sees the finish line. She increases her pace and accelerates at a constant rate until she crosses the finish line 19.4s later. What is her acceleration rate when saw the finish line?

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.