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What power is necessary for pulling a harrow with 50 times, each giving a resistance of 1 kg, when the speed of harrow is 5km/hr.

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+1 vote
in Farm Machinery by (38.9k points)
What power is necessary for pulling a harrow with 50 times, each giving a resistance of 1 kg, when the speed of harrow is 5km/hr.

(a) 0.980 KW

(b) 0.223 KW

(c) 0.680 KW

(d) 1.902 KW

The question was posed to me by my school teacher while I was bunking the class.

My enquiry is from Harrows in chapter Harrows, Cultivators and Intercultural Implements of Farm Machinery

1 Answer

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Best answer
Right option is (c) 0.680 KW

The best explanation: Total soil resistance = 50 kg

Power = \(\frac{soil \, resistance*speed}{1000}=\frac{50*9.8*5*1000}{1000*60*60}\) = 0.680 KW.

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