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If the coefficient of static friction between the coffee cup and the roof of the car is 0.24, What is the maximum acceleration the car can have without causing the cup to slide? Ignore the effects of air resistance.

Answer-

i know the formula is: Fs= (ms) (N)

i multipy 0.24 x 9.81m/s^2

and got =2.35 m/s^2

Did i do it right? Is my work correct? please help