Laws Of Motion Question 414
Question: Two blocks of masses $ m _{1} $ and $ m _{2} $ are placed in contact with each other on a horizontal platform. The coefficient of friction between the platform and the two blocks is the same. The platform moves with an acceleration. The force of interaction between the blocks is
Options:
A) zero, only if $ m _{1}=m _{2} $
B) non-zero, when $ m _{1}>m _{2} $
C) non-zero, when $ m _{1}<m _{2} $
D) zero in all cases
Show Answer
Answer:
Correct Answer: D
Solution:
[d]) The two blocks will have the same acceleration and identical free body diagrams.
Therefore, force of interaction between two blocks is zero in all cases.
