Laws Of Motion Question 161
Question: A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g = 10$ m{{s}^{-2}}) $ [Kerala (Engg.) 2000]
Options:
A) $ 100m{{s}^{-2}} $
B) $ 3m{{s}^{-2}} $
C) $ 10m{{s}^{-2}} $
D) $ 30m{{s}^{-2}} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ a=\frac{m _{2}}{m _{1}+m _{2}}g=\frac{3}{7+3}10=3m/s^{2} $
