Laws Of Motion Question 311

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=10m{{s}^{-2}} $ )

Options:

A) $ 100m/{{s}^{-2}} $

B) $ 3m/{{s}^{-2}} $

C) $ 10m/{{s}^{-2}} $

D) $ 30m/{{s}^{-2}} $

Show Answer

Answer:

Correct Answer: B

Solution:

[b] $ a=\frac{m _{2}}{m _{1}+m _{2}}\text{ g=}\frac{3}{7+3}\times 10=3m/s^{2} $



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