Discussion
Given below are two statements :
Statement I : The mass of an object is a measure of its inertia.
Statement II : Force of friction always opposes motion of objects.
In the light of the above statements, choose the most appropriate answer from the options given below :
Answer: A
Both Statement I and Statement II are correct.
Inertia is a body's resistance to a change in its state of rest or motion, and mass is the measure of that resistance: the larger the mass, the larger the force needed for a given acceleration (F = ma).
Friction acts along the surfaces in contact and always opposes the relative motion, or the tendency to relative motion, between them. That is why a sliding block slows down. In the school-level form of the statement both are true, which rules out the options marking either one wrong.
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