Question

The speed v reached by a car of mass m, driven with constant power P, is given by –

• A. v =
• B. v =
• C. v =
• D. v =

Answer 1

Answer: (C)

v =

Answer 2

P = Fv

or P = v

or $\int _ { 0 } ^ { \mathrm { x } } \frac { \mathrm { P } } { \mathrm { m } } \mathrm { dx }$

$\frac { \mathrm { v } ^ { 3 } } { 3 }$ = or v = $\left( \frac { 3 P x } { m } \right) ^ { 1 / 3 }$