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A body weighing 980n is moving with a constant speed of 5 m/ s on a horizontal surface .The coefficient of sliding friction between the body and the surface is 0.25.What horizontal pull is necessary to maintain the motion?

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Daedalusid
ΣFy = 0 because it is just moving on a horizontal surface
[tex]F_{n}-W=0 \\ F_{n} = W \\ F_{n} = 980N[/tex]

ΣFx=ma
but since the problem stated that the speed is constant, the acceleration is 0!
[tex]P-u_{k}F_{n}=0 \\ P = u_{k}F_{n} \\ P = 0.25*980 = 245 N[/tex]

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