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Unformatted text preview: ro, but not enough information to tell direction D) C) nonzero, but not enough information to tell direction zero D) zero A ! !!! !!!! ! !!! !!!! ! !!! !!!! ! !!! !!!!!! !!!!!!!!!! ! !!!! !!! !!! !!! !!!! !!!! !!!! !!! !! ! !!! !!!! !!! !!! !!!! ! !!!! !!! !!!! !!! !!! !!!! !!! !!! !!! ! !!! !!!! !!! ! !! !!! !!!! !! !!! !!! !!! ! !!!! !!! !!! !!!! !!! !!!! !!! !!! !!! !!!! !!!! !!! !! !!!! !!! !! !!!!! !!!! !! !! ! !! !! !! !!! !!! !! ! !!!! !!! !!! !!!!! ! !!!! !!!!!! ! ! ! ! !! ! ! ! !!!! !!! ! ! ! !!!! !!!!!! !! ! ! !!!!!!!!!! ! !!!!!!!!!!! ! ! !! ! ! ! ! ! !!! !!!! ! ! ! ! !!! !!!! ! !!!!! ! !!! ! ! !!! !!! !!!! ! !! ! ! ! ! !!! !!! ! !!! !!!! !!! !!! ! ! ! 9,.-/ %(*3/ !!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!! ! $# *&*)/'& ,*7 56 7. If the hinge disappeared, the left end of the bar would fall down. ># *&*)/'& ,*7 the axis The figure shows a force applied to a rod; 7&2* ?# *&*)/'& .5+ *&+ /*&53% is marked with a dot. What is the direction of the change in (*1&'0,+(&* 3(</* +& @*&2 2%/+%/' 56 &' 7&2* A# )/'& ￿ angular momentum d L ? dt B# /C5,- +& ! A) up B) down C) left D) right 3 E) The Earth spins around its axisout of a ,*4= (86,400 s). The Earth’s radius is R = 6.4 × 106 m. What 8. into the page day $ F) once the page is the Earth’s angular velocity ω ? !D# $ "EEFG 5*(1&'0 </'+(9,- . & &0 (4 ,++,9%/7 +& +%/ 9/(-(*3 .8 , %(*3/H ,4 4%&2*# $ 1m 2/(3%+ ! ,*7 , %&'()&*+,- 358 2('/ ,'/ ,++,9%/7 +& +%/ -&2/' /*7 &1 +%/ . & &0 ,4 (* 8. A 100 g meterstick balances on two wedges as shown. What is :%/ 65--/8 (4 0,44-/44 ,*7 1'(9+(&*-/44# :%/ +/*4(&* 1&'9/ " &1 +%/ %&'()&*+,- 358 100 g the force exerted by the left wedge on the meterstick? Assume 0,3*(+57/= the center of mass of the stick is right in the middle of it. F The Earth’s rotational period is T = 86400 s; in that tim...
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This note was uploaded on 01/15/2014 for the course PHYSICS 2130 taught by Professor Scotthill during the Spring '12 term at Toledo.

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