Question

A body slipping on a rough horizontal plane moves with a deceleration of 4.om/s square. What is the coefficient of kinetic friction between the block and the plane

Answer 1

Answer:

Let the mass be m.

Then on the horizontal surface, normal force is N=mg.

Hence friction is f=μN=μmg

Hence deceleration is a=

m

f

=μg

⟹μg=4⟹10μ=43

⟹μ=0.4

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Answer 2

Answer:

if the body is slipping then the only force which is responsible for providing retardation is the friction.

and that will also be the kinetic friction as the pbject is in motion..

frictional force =ùmg

a=f/m

4=ùg

• ù=0.4