Homework #1 Solution

Homework #1 Solution - 7########,##################T######

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Unformatted text preview: 7########,##################T###### #######H#####################7#####7##M####M####M####N # ##OZ####OZ####OZ####On####O#"##O####O#P##O#x##N*#0##Pn# ##P####S##*##S=####M########S#####P#m##S#####S#####T[#B##S#####S#####S#####S# ####S#####S######1. A refrigerator magnet is attached to the face of a refrigerator door (as shown to the right). The magnet has a mass of #2 kg (large magnet!) and the coefficient of static friction between the magnet and the refrigerator door is ms = 0.5. The magnet is at rest.A. Draw a free- body diagram for the magnet. B. Determine the magnitude (if possible) of all the vertical forces acting on the magnet. Show your work and explain your reasoning. (You may assume g10m/s2).#C. The refrigerator now spins about a vertical axis through its center, as shown to the right. The magnet remains at rest relative to the door. i. At the instant shown, draw a free-body diagram for the magnet. Vector lengths on this diagram should be consistent with the diagram in part A and with the laws of physics.ii.Explain the differences (if any) between this new diagram and the diagram drawn in part A. (For example, if a force increases in magnitude, explain why.)2. Griffiths, Problem 1.23. Griffiths, Problem 1.54. Griffiths, Problem 1.8Best of luck! Remember, my office is always open. #Physics 301 Homework Assignment #1 Due: Monday, September 8 # #u#v#8######x########l###j##########l#Z##k### ######k############y%PostScript Hack by Mike Brors 12/7/90/DisableNextSetRGBColor { userdict begin /setrgbcolor { pop pop pop userdict begin /setrgbcolor systemdict /setrgbcolor get def end } def end } bind def/bcarray where { pop bcarray 2 { /da 4 ps div def df setfont gsave cs wi 1 index 0 ne{exch da add exch}if grestore setcharwidth cs 0 0 smc da 0 smc da da smc 0 da smc c gray { gl} {1 setgray}ifelse da 2. div dup moveto show }bind put } if%% Used to snap to device pixels, 1/4th of the pixel in./stp { % x y pl x y % Snap To Pixel, pixel (auto stroke adjust) transform 0.25 sub round 0.25 add exch 0.25 sub round 0.25 add exch itransform} bind def/snapmoveto { % x y m - % moveto, auto stroke adjust stp moveto} bind def/snaplineto { % x y l - % lineto, auto stroke adjust stp lineto} bind def## ###### ##k######### ########### #########1######9########################### #8### #########1###8#)#A##################################8### #########1#(#8##A################################# #8# UUUU#1###A# #G######################### #8### ############# ### ################### ########Y#,# ## Helvetica###### #.#######*##magnet# ## ###### #### ########s## ##########s ##r### ######r############y%PostScript Hack by Mike Brors 12/7/90/DisableNextSetRGBColor { userdict begin /setrgbcolor...
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Homework #1 Solution - 7########,##################T######

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