A block of mass $$2Kg$$ is kept on a rough horizontal surface. It is pulled by applying a horizontal force F μ$$s=0.6$$ and μ$$k=0.4i)$$ If F $$=$$ $$12$$ N, frictional force on the block is $$7.84Nii)$$ If F $$=$$ $$10$$ N, frictional force on the block is $$10$$ $$Niii)$$ If F $$=$$ $$7.84$$ N, frictional force on the block is zero

Question

A block of  mass $$2Kg$$ is kept on a rough horizontal surface. It is pulled by applying a horizontal force F μ$$s=0.6$$ and μ$$k=0.4i)$$  If F $$=$$ $$12$$ N, frictional force on the block is $$7.84Nii)$$  If F $$=$$ $$10$$ N, frictional force on the block is $$10$$ $$Niii)$$  If F $$=$$ $$7.84$$ N, frictional force on the block is zero

Infinity Learn · Accepted Answer

Minimum force required to move the bodyμ$$smg=0.6$$×$$2$$×$$9.8=1.2$$×$$9.8=11.76if$$ F $$=$$ $$12$$ > $$11.76$$   So frictional force $$=$$ μ$$kgm=$$ $$7.84$$ N.if F $$=$$ $$10$$ < $$11.76$$  frictional force is $$10$$ N.

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A block of mass 2Kg is kept on a rough horizontal surface. It is pulled by applying a horizontal force F μs=0.6 and μk=0.4i) If F = 12 N, frictional force on the block is 7.84Nii) If F = 10 N, frictional force on the block is 10 Niii) If F = 7.84 N, frictional force on the block is zero

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