5. You do 200 J of work pulling the oars of a rowboat. What can you say about the amount
of work the oars do to move the boat? Explain.

The force will determine the acceleration.

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.

At what time will the interfering waves have an amplitudeof zero?