Laws Of Motion Question 113

Question: 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]

Options:

A) 98 J

B) 72J

C) 56 J

D) 34 J

Show Answer

Answer:

Correct Answer: A

Solution:

$ W=\mu mgS=0.2\times 50\times 9.8\times 1=98\ J $



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