A block of mass 1 kg slides down on a rough inclined plane of inclinat – McqOptions

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1.	A block of mass 1 kg slides down on a rough inclined plane of inclination \[{{60}^{o}}\] starting from its top. If the coefficient of kinetic friction is 0.5 and length of the plane is 1 m, then work done against friction is (Take\[g=\text{ }9.8m/{{s}^{2}}\]) [AFMC 2000; KCET 2001]
A.	9.82 J
B.	4.94 J
C.	2.45J
D.	1.96 J
Answer» D. 1.96 J

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