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 $\mu $. The acceleration $\alpha $ of the cart that will prevent the block from falling satisfies

Question

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 $\mu $. The acceleration $\alpha $ of the cart that will prevent the block from falling satisfies

$\alpha > {{mg} \over \mu }$

$\alpha > {g \over {\mu m}}$

$\alpha \ge {g \over \mu }$

$\alpha < {g \over \mu }$

Solution

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