Question

Power P is required to lift a body a distance d at constant speed v. What power is require to lift the body at distance 2d at constant speed 3v?

Answer 1

P ~ F v

\[\frac{ P _{1} }{ P _{2} } = \frac{ v_{1} }{ v _{2} }\]

\[P _{_{2}} = \frac{ v _{2} }{ v _{1}} \times P _{1}\]

\[P _{2} = \frac{ 3v }{ v } \times P\]

P2 = 3P

Answer 2

So distance doesn't matter? Will there be same result if the body is lifted at different distance?