A student threw a ball horizontally out of a window 7.9 meters above the ground. It was caught by another student who was 17.0 meters away. What was the horizontal velocity of the ball?

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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.

Match each scenario to the form of energy it represents