The force needed is 0.468 N
Explanation:
For an object resting on a flat surface, the maximum force of static friction acting on the object is given by
[tex]F_f = \mu_s mg[/tex]
where
[tex]\mu_s[/tex] is the coefficient of static friction
m is the mass of the object
g is the acceleration of gravity
Therefore, in order to put the object in motion, it is necessary to apply a force at least equal to the maximum force of friction.
For the glass of milk, we have:
[tex]\mu_s = 0.125[/tex]
[tex]m=0.382 kg[/tex]
[tex]g=9.8 m/s^2[/tex]
Therefore, the force that needs to be applied is
[tex]F=(0.125)(0.382)(9.8)=0.468 N[/tex]
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