Show that the speed of a body of mass

PHYSICS · Subjective · AP · Physics C: Mechanics · Work Energy and Power · Work Energy and Power

Problem

Show that the speed

v

of a body of mass

m

, which starts from rest on a smooth horizontal track under the action of a machine delivering constant power

P

, is given by

v=\sqrt{\dfrac{2Pt}{m}}

where

t

is the time for which the power acts.