Laws Of Motion Question 155
Question: Two bodies of mass 3 kg and 4 kg are suspended at the ends of massless string passing over a frictionless pulley. The acceleration of the system is $ (g=9.8m/s^{2}) $ [MP PET 1994; CBSE PMT 2001]
Options:
A) $ 4.9m/s^{2} $
B) $ 2.45m/s^{2} $
C) $ 1.4m/s^{2} $
D) $ 9.5m/s^{2} $
Show Answer
Answer:
Correct Answer: C
Solution:
Acceleration$ =\frac{(m _{2}-m _{1})}{(m _{2}+m _{1})}g $
$ =\frac{4-3}{4+3}\times 9.8=\frac{9.8}{7}=1.4m/{{\sec }^{2}} $
