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A block of mass m is placed on an inclined plane and angle of inclination is increasing with respect to time. Coefficient of friction is 3/4, which of the following is incorrect? (1) When body is at rest N+f+mg =0 (2 )f=mgsinθ when θ (3) f=μmgcosθ when θ>=37° (4)When body is at rest Ncosθ=mg

A block of mass m is placed on an inclined plane and angle of inclination is increasing with respect to time. Coefficient of friction is 3/4, which of the following is incorrect?


(1) When body is at rest N+f+mg=0


(2)f=mgsinθ when θ<37°


(3)f=μmgcosθ when θ>=37°


(4)When body is at rest Ncosθ=mg

Grade:11

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