Explanation:Acceleration is the rate of change of the velocity of an object with respect to time. The acceleration of 50.0 N box is at rest on a horizontal surface is zero.
It is the rate of change of the velocity of an object with respect to time.
Given Here ,
50 N box is at rest
Coefficient of static friction = 0.5
Coefficient of kinetic friction = 0.3
Force exerted on the box = 20 N
Static friction force formula
The Static friction force is grater than the force exerted on the box.
Hence we can conclude that the acceleration of 50.0 N box is at rest on a horizontal surface is zero.
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