AIPMT PRELIMS2010Physics-Laws of Motion
AIPMT PRELIMS 2010 Physics Friction MCQ Question
Type: MCQ-conceptual-Medium-Class 11
A block of mass m is in contact with the cart C as shown in the figure. The coefficient of static friction between the block and the cart is μ. The acceleration α of the cart that will prevent the block from falling satisfies
A
α < g/μ
B
α > mg/μ
C
α > g/μm
D
α ≥ g/μ
Correct Answer
Option D
Detailed Explanation
To prevent the block from falling, the frictional force must be equal to or greater than the gravitational force. Thus, μmα ≥ mg, leading to α ≥ g/μ.
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