Laws Of Motion Question 165
Question: Two masses $ m _{1}=5kg $ and $ m _{2}=4.8kg $ tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when they are free to move $ (g=9.8m/s^{2}) $ [AIEEE 2004]
Options:
A) $ 0.2m/s^{2} $
B) $ 9.8m/s^{2} $
C) $ 5m/s^{2} $
D) $ 4.8m/s^{2} $
Show Answer
Answer:
Correct Answer: A
Solution:
$ a=[ \frac{m _{1}-m _{2}}{m _{1}+m _{2}} ]g=[ \frac{5-4.8}{5+4.8} ]\times 9.8=0.2\ m/s^{2} $
