Questions
A force F pushes a block weighing l0 kg against a vertical wall as shown in the Figure. The coefficient of friction between the block and wall is 0.5. The minimum value of F to start the upward motion of block is : (g = 10m/s2)
detailed solution
Correct option is A
FBD of blockFrom diagramN=Fcos37∘=F45=4F5To start upward motionFsin37∘=10g+μNTherefore, 35F=100+0.545FTalk to our academic expert!
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A person just holds a block weighing 2kg between his hands & just keeps it from falling down by pressing it with his hands. If the force exerted by each hand horizontally is 50N, the coefficient of friction between the hand & the block is
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