| Direction: For questions given below two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes [a], [b], [c] and [d] as given below. |
| Assertion Mass is a measure of inertia of the body in linear motion. |
| Reason Greater the mass, greater is the force required to change its state of rest or of uniform motion. |
A) Both A and R are true and R is correct explanation of the A.
B) Both A and R are true but R is not the correct explanation of the A.
C) A is true but R is false.
D) A is false but R is true.
Correct Answer: A
Solution :
| Both A and R are true and R is correct explanation of the A. |
| According to Newton's 2nd law, |
| \[a=\frac{F}{M}\] |
| i.e. greater the mass, greater is the force required to change its state of rest or of motion. So, mass is a measure of opposition offered, when a force is applied. Hence, mass of a body is a measure of inertia. |
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