A block of mass $$20$$ kg is moved with constant velocity along an inclined plane of inclination $$37$$° with help of a force of constant power $$50$$ W. If the coefficient of kinetic friction between block and surface is $$0.25$$, then what fraction of power is used against gravity?

Question

Infinity Learn · Accepted Answer

Power, $$P=Fv=(mgsin$$⁡θ$$+$$μmgcos⁡θ$$)vso$$, required fraction $$=(mgsin$$⁡θ$$)v(mgsin$$⁡θ$$+$$μmgcos⁡θ$$)v=$$$$sin$$⁡θ$$sin$$⁡θ$$+$$μ$$cos$$⁡θ$$=34$$

A block of mass 20 kg is moved with constant velocity along an inclined plane of inclination 37° with help of a force of constant power 50 W. If the coefficient of kinetic friction between block and surface is 0.25, then what fraction of power is used against gravity?

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