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Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.PowerMedium2 minQB

PhysicsMediumsingle choice

A train of weight $1 0^{7} N$ is running on a travel track with uniform speed of $36 km h^{- 1}$ . The frictional force is $0.5 kgf$ per quintal. If $g = 10 m/ s^{2}$ , power of engine is

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Answer:

Solution:

Train mass $= 1 0^{6} kg = 1 0^{4}$ quintals.

$F = 0.5 (1 0^{4}) kgf = 50000 N$

$v = 36 km/h = 10 m/s$

$P = F v = 5 \times 1 0^{5} W = 500 kW$

Stream:JEESubject:PhysicsTopic:W.E.P.Subtopic:Power

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