Work Energy And Power Question 185
Question: An engine develops 10 kW of power. How much time will it take to lift a mass of 200 kg to a height of 40 m. $ (g=10m/{{\sec }^{2}}) $ [CPMT 1992]
Options:
A) 4 sec
B) 5 sec
C) 8 sec
D) 10 sec
Show Answer
Answer:
Correct Answer: C
Solution:
$ P=\frac{mgh}{t}=10\times 10^{3} $
therefore $ t=\frac{200\times 40\times 10}{10\times 10^{3}} $
$ =8\sec $
