A block is on a surface with us=0.276. It takes 1.11 N to break it free from static friction. What is the mass of the block?

m = 0.409 [kg].

Explanation:

The friction force is defined as the product of the coefficient of friction by the normal force. In this way, we have the following equation.

F = μ*N

Where:

F = friction force = 1.11 [N]

μ = static coefficient = 0.276

N = Normal force [N]

We can clear the normal Force.

And the normal force of a body lying on a horizontal surface, can be calculated by means of the product of mass by gravitational acceleration.

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