Tue June 14, 2011 By: Tushar Jain

Block (mass M ) resting on rough horizontal floor is pulled by F at angle Q with horizontal.u is coeff of friction. Find acc of block.

Expert Reply
Wed June 15, 2011
There are two components of applied force, one is acting along the horizontal and another one acting vertically upward.
then, Mg = R + F sinQ
 R = Mg - F sinQ
Net force on block = F cosQ - u R = F cosQ - u (Mg - F sinQ)
Acceleration of the block = Net force / M
                                   = [F cosQ - u (Mg - F sinQ)]/M
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