The minimum acceleration that must be imparted to the cart in fig., so that the block A will not fall, given µ is the coefficient between the surfaces of block and cart
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a
µ g
b
g/µ
c
g/õ
d
µ/g
answer is B.
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Detailed Solution
The fictitious force on block A that presses the cart back is given by m a.The upward friction F = µ m aFor block A to be stationary,µ m a=mga = (g/µ).
The minimum acceleration that must be imparted to the cart in fig., so that the block A will not fall, given µ is the coefficient between the surfaces of block and cart