Question

12 A motor is used to lift a load 0.50 m vertically, as shown.
motor
0.50 m
load
40N
The load weighs 40 N. The power of the motor is 20 W and the system is 25% efficient.
How long does it take to raise the load?
(A)0.040 s
(B) 0.25 s

(C)4.0 s
(D)40 s​

Answer 1

Answer:

the given question , answer is

(B) = 0.25s

Answer 2

Answer:

C

Explanation:

(40*0.50)/(0.25*20)=t

t = 4