In order for an object to experience a change in velocity, the object must experience which of the following? a) a net force
b) an acceleration
c) both of the above
d) none of the above

What is the coefficient of kinetic friction μk between the block and the tabletop?

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.

Of is j/kg·k. if a 2.6 kg of isk to k, is ?