test093p1 - PHYS 1111,Section 5, Fall 2009 Test no. 3...

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Unformatted text preview: PHYS 1111,Section 5, Fall 2009 Test no. 3 October 29,2009 2:00pm - 3:15pm NOTE: This lesl consists of 2{) multiple choice proDlems. 18 oflhe proDlems ore re¥uired, while Ihe extro 2 ore for Donus points. Fill in your nome, SIu"enlID, on" onswers on Ihe sconlron sheet. Fou moy Keep Ihe problem sheet when you ore finished An e¥uonon sheet oppeors on Ihe IIISIpoge. TRUE/FALSE. Choose 'True' if the statement is true and 'False' if the statement is false. 1) Non-conservative forces convert mechanical energy into other forms of energy, or convert other forms of energy into mechanical energy. 1) B) False 2) 2) Power is a vector quantity. JS A) True 3)L 3) A system that has zero mome.ll.tum must also have zero kinetic energy. A) True ~ -p ~~ -::. ~ =-- bvt t/~~~V. 2 P,. - PI /c:)... ,, c j I?! t{ l.... l.-- MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. i]) Ua == rr. d ~ :; L21c:8)Ct01i-J(3~) 36051 5) Us~ (oMqrv ..~CI'" G,~GF Uj ~ kF t'vl ~ ..::= 5- ()IV! 2 FIGURE 1 _ /// t Vr 3m O_~ __ J ~g- 4 i§JV2 _ 4 l..-:::= .:::: r ( ,/.,/,,/ .//// V Vf:= <{ryf/ft of PVlC"V; ~ 0 ,.,) -=- 7-7"It h .-? lOt, (S~I lj Bh?/j In An object of mass 2 kg is held at the top of a triangular wedge as shown in Figure I, and then released. The reference level for potential energy is at the base of the triangle. Neglect friction and use g = 10 m/s2. 4) Refer to Figure 1. What is the gravitational potential energy of the object at the top of the wedge? A) 30 J B) SOJ C) 40 J D) 100 J ~ 4) 5) Refer to Figure 1. What is the speed of the object just before it reaches the bottom of the ;yedg~? A)6m/s B)2m/s C)Om/s D)10m/s (E)Sm/s 5) l3 E' ...
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This note was uploaded on 12/10/2011 for the course PHY 1111 taught by Professor Stencil during the Fall '11 term at University of Georgia Athens.

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