Written Homework 4 Solutions

# Written Homework 4 Solutions - Physics 221Fall2}07 18...

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Physics 221Fall2}07 Written Homework due Tuesday September 18 1-- A 3.5 kg block is pushed along a horizontal floorby a force F of mqgnitude 15 N at an angle of 40 degrees with respect to the horizontal (as shown in sketch). The coefficient of kinetic friction between the block and the floor is 0,25. Calculate the magnitudes of the (a) frictional force on the block from the floor and (b) the acceleration of the block. \) __-\r\<,os€ \rl s,"e 2f ^= - \c3t Nl I ttsu) cds€ = z14nc\ C\= C.\1 ^/f { /FY= NJ *^7 -\F\sr.'e =Q [:,i\.r) 11 .r€i r(lsN) si,- uro N= Ha.y \$J A N \0,1t NJ 7" N\ f- +----L ,ln

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Physics 221 Fall2007 Written Homework due Tuesday September 18 2-- The two blocks, shown below, with m : 16 kg and M - 88 kg are not attached to each other. The coefficient of static friction between the blocks is po: 0.38, but the surface beneath the larger block is frictionless. (a) Draw a free body diagram for each mass. (b) What is the minimum magnitude ofthe horizontalforcei, F, needed to keep the smaller block from slipping down the larger block? (c) For this minimum force, F, what q
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Written Homework 4 Solutions - Physics 221Fall2}07 18...

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