Question

Pranesh is in seat number 48 of a train moving with a speed of 18 km/h and Srinidhi is standing on the platform. Then
A: Pranesh is moving according to another prople outside the train.
B: Srinidhi is moving according to Pranesh
C: Pranesh is moving according to Srinidhi
D: Pranesh is at rest according to the Srinidhi.
Then the incorrect options are
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Answer 1

Answer:

Option D is incorrect.

Step-by-step explanation:

• Motion is always a relative term. A body can be said to be in motion if it changes its position with respect to another body. Now say, if two bodies with moving with the same velocity, in a direction parallel to each other then for an observer in any of the two bodies, the other body will appear to be stationary.

• Relative motion is the calculation of the motion of an object with regard to some other moving or stationary object. Thus, the motion is not calculated with reference to the earth but is the velocity of the object in reference to the other moving object as if it were in a static state.

• If an observer is at rest in his or her own frame of reference, he may be moving in another observer's frame of reference. So if two different observers are not at rest with respect to each other, then they too get different results when they observe the motion or rest of a body.

Thus, Options A, B & C are correct and option D is incorrect.