Question

Assertion: There is a resistance offered by an object to change its state of motion. Reason : The mass of an object is a measure of its inertia

Answer 1

By its mass. There is a resistance offered by an object to change its state of motion. If it is at rest it tends to remain at rest; if it is moving it tends to keep moving. This property of an object is called its inertia.

hope u understood

Answer 2

Assertion and reason both are true but the reason is not correct explanation for assertion.

Explanation:

• Newton's first law states that "Any object at rest will remain at rest and any object in motion will stay in motion unless an external force is applied to it". This is also called the law of inertia".

• Inertia is the property of a body to resist any change in its state.

• It depends on the mass of the body. When mass is large, the tendency to resist change in its state becomes more and so more force will be required for any state change.
• It can be derived that mass is a measure of its inertia.