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A constant power P is acting on a car of mass m . The velocity increases from v1 and v2 .The distancce travelled by the car during this change is a,3p/m(v22-v12)b,m/3p(v2-v1)c,m/3p(v22-v12)d,m/3p(v23-v13)

mansu susan joji , 8 Years ago
Grade 10
anser 1 Answers
Vikas TU

Last Activity: 8 Years ago

Since Power is constant,
P = F x V => MaV 
and also,
a = vdv/dx
putting value of a in Power we get,
(P/m)dx = v^2dv
Integerating both sides we get,
Px/m = (v2^3 – v1^3)/3
x = (v2^3 – v1^3)m/3p

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