The property of a body to remain at rest or to continue to move in a straight line is known as

Analysis

The question asks for the specific physical property of matter that resists any change in its state of rest or uniform motion in a straight line. This is a fundamental concept in classical mechanics, specifically related to Newton's First Law of Motion.

Concept Explanation

This concept is defined by Newton’s First Law of Motion, often called the Law of Inertia.

• Inertia is the inherent property of a body that makes it resist any change in its state of rest or motion.
• If an object is stationary, it wants to stay stationary.
• If an object is moving at a constant velocity, it wants to keep moving at that same velocity in the same direction.
• An external force is required to overcome this inertia to change the object's state.

Let's look at why the other options are incorrect:

• Force: This is the agent (a push or a pull) that causes a change in the state of rest or motion; it is not the property of the body itself.
• Impulse: This is the product of force and the time for which it acts, which results in a change in momentum.
• Energy: This is the capacity to do work.

Step-by-Step Solution

1. Identify the definition: The statement "the property of a body to remain at rest or to continue to move in a straight line" is the textbook definition of inertia.
2. Relate to Newton's Laws: Since Newton's First Law states that an object will maintain its state unless acted upon by an external force, the "resistance" to that change is what we call inertia.
3. Match with options: Comparing this definition to the provided options, "Inertia" (Option D) is the correct term.

Conclusion

Exam Tip: Think of "Inertia" as "Laziness." Just as a lazy person prefers to stay in bed (at rest) and keep doing what they are already doing, an object with inertia prefers to keep doing exactly what it is currently doing!