MCQ Solution: Laws of Motion
A cart of mass has a block of mass m attached to it as shown in figure. The coefficient of friction between the block and the cart is µ. What is the minimum acceleration of the cart so that the block m does not fall
1)µg
2) g/µ
3)µ/g
4)Mµg/m
Solution
Let a be the acceleration of trolley
From the FBD of block
N=ma
∴ µN=mg
µma=mg
a=g/µ
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