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test094p2

test094p2 - 5 Angular momentum cannot be conserved if A the...

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5)~ 5)Angular momentum cannot be conserved if A) the angular velocity changes. B)the angular acceleration changes. ~ there isanet force on the system. D) he net torque isnot zero. E the moment ofinertia changes. 6)Asound source departs from astationary observer. The frequency heard by the observer is A) equal to zero. (B) lower than the source. (j higher than the source. D) the same as that ofthe source. E) impossible to predict. 6) 5 7) o 7)At what ~titude_should a satellite be placed into circular orbit so that its orbital period is48.0 hours? The mass ofthe earth is5.976 x 10 24 kg and the radius ofthe earth is6.378 x 10 6 m. X A) 6.71 x 10 7 m 31, ~ G 1/)2(] B)8.22 x 10 7 m r~ 2 II 7\ 2.. ~ r< ~ I ((; f,,) 2 )/;, C) 4.22 x10 7 m ~ 2rr ~ @6.07 x 10 7 m V 6 M !Z (/72,100;; 0 -ti)li/ S" 'I 76Xlo~ E) 7.58 xl07 m c: ( (.6 7)f{l J I T - 4()/ 60,.,i? 6Dse~ - - ./ - ~hr,) X - x-- - )72Idu S. '2..,J 'I thy /fI>,,? I 8)Apencil, 15.7cm long, isreleased from avertical position with the eraser end resting on atable. 8) _ The eraser does not slip. Treat the pencil like auniform rod. What isthe angular speed ofthe pencil when it makes a30.0°angle with the vertical?
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