1.

A 200 kg wagon climbs up a hill of slope 30-degrees in 1 minute at a speed of 10 m/s. How much power is delivered by the engine? (Assume g = 10m/s^2)(a) 10 kW(b) 20 kW(c) 30 kW(d) 40 kWI had been asked this question during an interview.My doubt stems from Power topic in chapter Work, Energy and Power of Physics – Class 11

Answer»

The correct answer is (B) 20 KW

Easy explanation: WEIGHT of car = m x g

 = 2,00 x 10

 = 2,000 N

Total force (F) = 2,000

Velocity (v) = 10 m/s

P = F x v

 = 2000 x 10

 = 20,000 W

 = 20 kW.



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