Laws Of Motion Question 368

Question: If mass of $ A=10kg $ , coefficient of static friction = 0.2, coefficient of kinetic friction = 0.2. Then mass of B to start motion is[Orissa PMT 2004]

Options:

A)2 kg

B)2.2 kg

C)4.8 kg

D)200 gm

Show Answer

Answer:

Correct Answer: A

Solution:

$ {{\mu } _{s}}=\frac{m _{B}}{m _{A}}\ \ \Rightarrow \ 0.2=\frac{m _{B}}{10}\ \ \Rightarrow m _{B}=2\ kg $



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