09_26_Three_Blocks

09_26_Three_Blocks - rd law pairs. c) Draw a FBD...

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Physics 211 9/26 HW Handout Due Monday 9/30 Fall 2002 Three Blocks 1) A hand pushes three blocks across a frictionless table with an acceleration of 2m/s 2 as shown below. There are vertical forces on the blocks, but no net force in the vertical direction, so you may omit vertical arrows of from your FBD’s for the sake clarity and space. The masses are given below. a) Draw a FBD (horizontal forces only) of block C consistent with Newton’s second law. b) Draw a FBD (horizontal forces only) of block B consistent with Newton’s second and third laws. Identify any 3
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Unformatted text preview: rd law pairs. c) Draw a FBD (horizontal forces only) of block A consistent with Newtons second and third laws. Identify any 3 rd law pairs. d) What is the net force on each individual block? Show your work. e) Using Newtons 2 nd and 3 rd laws find the magnitude of each force in all of your FBDs. Show your work. f) Draw a FBD of the system consisting of all three blocks together and find the force the hand puts on the system . Is it the same as N H,A found in part e? B C A 1kg 3kg 2kg a = 2m/s 2 to the right...
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