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20 Nov 2019
A 21 N block rests on a horizontalsurface. The coefficients ofstatic and kinetic friction betweenthe surface and the block areμs = 0.80 andμk = 0.60. Ahorizontal string is attachedto the block and a constant tensionT is maintained in thestring. What is the force offriction acting on the block for eachof the following values ofT?
(a) T = 15 N
N
(b) T = 28 N
N -----------------------------------------------------------------------------------------------
A 21 N block rests on a horizontalsurface. The coefficients ofstatic and kinetic friction betweenthe surface and the block areμs = 0.80 andμk = 0.60. Ahorizontal string is attachedto the block and a constant tensionT is maintained in thestring. What is the force offriction acting on the block for eachof the following values ofT?
(a) T = 15 N
N
(b) T = 28 N
N
N
(b) T = 28 N
N
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Lelia LubowitzLv2
30 May 2019