a block of mass 4 kg is resting on a rough horizontal plane and is about to move when a horizontal force of 30 N is applied on it. if g = 10 m/s^2 find the total contact force exerted by the plane on the block

Dear student,

F=30Nm=4kgso F=maa=Fm=304=7.5m/s2μ=ag=7.510=34Contact force= Frictional force=μmgF=34×4×10=30NContact force=30N

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