Question

5. How can you tell if an object is in motion?
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Answer 1

Answer:

An object is in motion if its distance relative to another object is changing. To tell if an object is moving, you use a reference point. If an object's distance from another object [reference point] is changing. A place or object used for comparison to determine if something is in motion.

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Answer 2

We can tell if an object is in motion or not if it changes its position with time, with respect to a point of reference.

• If we sit in a car and look at the things inside the car like the steering, seats, or people inside it, we will observe that they are at rest.
• A person standing outside the car will observe the above-mentioned things to be in motion as they are changing position with respect to him as the time passes.
• So, the motion of an object is dependent on the point of reference and no object can be said to be at absolute rest or absolute motion.

∴ An object can be said to be in motion if it changes its position with respect to a reference point with the passage of time.