A block of mass 50 kg slides over a horizontal distance of 1 m. If t – McqOptions

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1.	A block of mass 50 kg slides over a horizontal distance of 1 m. If the coefficient of friction between their surfaces is 0.2, then work done against friction is [BHU 2001; CBSE PMT 1999, 2000; AIIMS 2000]
A.	98 J
B.	72J
C.	56 J
D.	34 J
Answer» B. 72J

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