Inertia depends on which property of an object?

Question

Question

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RRB JE CE 22 Apr 2025 Shift 2 CBT 2 Official Paper

Answer 1

The correct answer is Mass.

Key Points

Inertia is the property of an object that resists changes in its state of motion or rest.
The inertia of an object is directly proportional to its mass; the greater the mass, the greater the inertia.
Mass is a measure of the quantity of matter in an object, and it determines how difficult it is to change the object's motion.
Inertia is independent of other properties like shape, velocity, or acceleration.
This fundamental concept is explained in Newton's First Law of Motion, which states that an object will remain at rest or in uniform motion unless acted upon by an external force.

Additional Information

Newton's First Law of Motion: Also known as the Law of Inertia, it describes how an object will not change its motion unless acted upon by an external force.
Types of Inertia:
- Inertia of Rest: The tendency of an object to remain at rest.
- Inertia of Motion: The tendency of an object to maintain its motion.
- Inertia of Direction: The tendency of an object to maintain its direction of motion.
Mass vs. Weight: Mass is an intrinsic property of an object, while weight is the force exerted by gravity on that mass (Weight = Mass × Gravitational Acceleration).
Practical Examples of Inertia:
- A passenger tends to move forward when a vehicle suddenly stops due to the inertia of motion.
- A book lying on a table remains stationary unless pushed, due to the inertia of rest.
Relation with Force: To overcome an object's inertia, a force proportional to its mass and desired acceleration must be applied (F = ma, as per Newton's Second Law).