A golf ball is launched at an angle of 45o. The ball has an initial vertical velocity of 12 m/s and an initial
horizontal velocity of 12 m/s. Forget air resistance. The ball reaches its maximum height 1.2
seconds after it is launched and lands at the same height that is launched from. The total
horizontal distance reached by the golf ball is about

Work = force × a. work b. energy c. distance d. momentum

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above

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.