5
W- (2j+ 3j +51). (i+2j +3k)

If the speed of a particle triples ,by what factor does its kinetic energy increase?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

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.