Question 31 of exercise
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The answer is 2) 60 N.
The frictional force acting on the mass = mg * 0.6 = 10 * 10 * 0.6 = 60 N.
Friction is the resistance to motion of one object moving relative to another.
It is not a fundamental force, like gravity or electromagnetism.
Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.
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