Assertion: The dimensional formula for relative velocity is the same as the dimensional formula for velocity change.
Reason: The relative speed Q of P w.r.t. is the ratio of the speed of P to the speed of Q.
Both the assertion and the reason are true, and the reason is the correct interpretation of the assertion.
Both the assertion and the inference are true, but the inference is not a correct interpretation of the assertion.
The statement is true, but the reason is false.
Both the assertion and the reason are false.
Answer: (C) The statement is true, but the reason is false.
Explanation:
To solve this problem, we first need to have a basic understanding of relative velocity,
and it's probably not quite what the name suggests.
Suppose a particle P is moving in a certain direction with a velocity of magnitude vp.
Suppose also that another particle Q is also moving in the same direction, of size vq. Now we can give the relative speed of P with respect to Q as follows:
We can see that the relative speed is just the difference between two speeds, which has the
same dimensional formula as the change in speed, which in turn will have the same dimension formula as velocity.
The dimensional formula of all these terms will give:
We have now developed the fact that this statement is true.
As for why, let's see how plausible this claim is.
Reason states: The relative speed of P to Q is the ratio of the speed of P to the speed of Q.
We have seen that the relative velocity is not the ratio of the velocities of P and Q, but the difference between the velocities of the particles P and Q. We can therefore say with certainty that this cause is not only false but is it even wrong.
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