NEET Physics Laws of Motion Questions Solved

A 20 kg block is initially at rest on a rough horizontal surface. A horizontal force of 75 N is required to set the block in motion. After it is in motion, a horizontal force of 60 N is required to keep the block moving with constant speed. The coefficient of static friction is 

(1) 0.38

(2) 0.44

(3) 0.52

(4) 0.60

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