Jill does twice as much work as Jack does and in half the time.Jill's power output is
A)the same as Jack's power output.
B)one-fourth as much as Jack's power output.
C)one-half as much as Jack's power output.
D)twice Jack's power output.
E)four times Jack's power output.

Question

Quizplus · Accepted Answer

Power is defined as the amount of work done per unit of time. Since Jill does twice as much work in half the time, her power output is $2 \times 2 = 4$ times that of Jack's, making it four times Jack's power output.

Jill Does Twice as Much Work as Jack Does and in Half