A weight lifter lifts a mass at constant speed to a height in time

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

12. A weight lifter lifts a mass

m

at constant speed to a height

h

in time

t

. How much work is done by the weight

\begin{array}{llllll}\text { lifter? } & \text { (A) } m g & \text { (B) } m h & \text { (C) } m g h & \text { (D) } m g h t & \text { (E) } m g h / t\end{array}

(A)

m g

(B)

m h

(C)

m g h

(D)

m g h t

(E)

m g h / t