Which of the following expressions gives the power developed when a crane raises a…

PHYSICS · Single correct · GCSE · Physics · Energy · Energy

Problem

Which of the following expressions gives the power developed when a crane raises a load of mass

m

through a height

h

in time

t

at constant speed? (a)

\dfrac{mgh}{2t}

(b)

\dfrac{3mgh}{2t}

(c)

\dfrac{mgh}{t}

(d)

\dfrac{2mgh}{t}