Work Energy And Power Question 234
Question: A block of mass 1 kg is pulled along the curve path ACB by a tangential force as shown in figure. The work done by the frictional force when the block moves from A to B is
Options:
A) 5 J
B) 10 J
C) 20 J
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Work done by friction
$ =\int{\vec{F}.\overrightarrow{ds}=\int\limits_0^{x}{\mu mg\cos \theta \frac{dx}{\cos \theta }=\mu mgx=20J}} $
