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Relative velocity is...

Relative velocity is

A

Apparent velocity of one when it is observed by another

B

Actural velocity of one when it is observed by stationary observer

C

Rate of change of position of one w.r.t another

D

Actual velocity of one when second one velocity is assumed as zero

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The correct Answer is:
To solve the question regarding relative velocity, we will analyze each of the provided options step by step. ### Step 1: Understanding Relative Velocity Relative velocity refers to the velocity of one object as observed from another object. It is important to understand that the velocity of an object can change depending on the frame of reference from which it is observed. ### Step 2: Analyzing Option 1 **Option 1:** "Apparent velocity of one when it is observed by another." - When two objects are moving in the same direction, the velocity of one object as observed from the other can be calculated by subtracting their velocities. If object A moves with velocity V and object B moves with velocity U, the relative velocity of A with respect to B is V - U. This means that the apparent velocity of one object as seen from another is indeed the relative velocity. - **Conclusion:** Option 1 is correct. ### Step 3: Analyzing Option 2 **Option 2:** "Actual velocity of one when it is observed by a stationary observer." - A stationary observer measures the actual velocity of an object without any relative motion. If object A has a velocity V, then the observer will see this velocity as it is, without any influence from another moving object. - **Conclusion:** Option 2 is also correct. ### Step 4: Analyzing Option 3 **Option 3:** "Rate of change of position of one with respect to another." - The relative velocity can also be defined as the rate of change of the distance between two objects over time. If we consider the positions of two objects, the change in their positions over time gives us the relative velocity. - **Conclusion:** Option 3 is correct. ### Step 5: Analyzing Option 4 **Option 4:** "Actual velocity of one when the second one's velocity is assumed as zero." - When we assume that one object is at rest (velocity = 0), the velocity of the other object can be considered as its relative velocity. This is a common method in physics to simplify the analysis of motion. - **Conclusion:** Option 4 is also correct. ### Final Conclusion All four options provided in the question correctly describe aspects of relative velocity. Therefore, relative velocity can be understood in multiple ways, all of which are valid.
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