FrictionHard
Question
A block of mass m is in contact with the cart C as shown in the figure

The coefficience of static friction between the block and the cart is μ. The accleration α of the cart that will prevent the block from falling stisfies

The coefficience of static friction between the block and the cart is μ. The accleration α of the cart that will prevent the block from falling stisfies
Options
A.

B.

C.

D.

Solution
α ← Pseudo acceleration

Pseudo force or fictious force, Ffic = mα
Force of friction, = μN = μmα
The block of mass m will not fall as long as
f ≥ mg
μmα ≥ mg
α ≥

Pseudo force or fictious force, Ffic = mα
Force of friction, = μN = μmα
The block of mass m will not fall as long as
f ≥ mg
μmα ≥ mg
α ≥

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