What is relative motion ? Explain it

1.	What is relative motion ? Explain it
Answer» Relative velocity is defined as the velocity of one body with respect to another body. Let us consider two observers A and B are making measurements of an event P in space from two frames of reference as shown in figure. At the beginning let the two origins of the two reference frames coincide and are on the same line. Let the observer B is moving with a constant velocity VBA with respect to A. Now we can connect the positions of the event P as measured by A with the position of P as measured by B. As B is moving with constant velocity at the time of observation of event P, the frame B has moved a distance XBA with respect to A. X_PA = X_PB + X_BA → (1) "The position of P as measured by observer A is equal to the position of P as measured by B plus the position of B as measured by A". eq (1) can also be written as V_PA = V_PB + V_BA → (2)

Answer»

Relative velocity is defined as the velocity of one body with respect to another body.

Let us consider two observers A and B are making measurements of an event P in space from two frames of reference as shown in figure. At the beginning let the two origins of the two reference frames coincide and are on the same line.

Let the observer B is moving with a constant velocity VBA with respect to A. Now we can connect the positions of the event P as measured by A with the position of P as measured by B.

As B is moving with constant velocity at the time of observation of event P, the frame B has moved a distance XBA with respect to A.

X_PA = X_PB + X_BA → (1)

"The position of P as measured by observer A is equal to the position of P as measured by B plus the position of B as measured by A".

eq (1) can also be written as V_PA = V_PB + V_BA → (2)

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