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Question

Test dimensionally if the equation v2=u2 + 2ax may be correct.


A

correct for sure

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B

may be correct

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C

wrong for sure

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D

none of these

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Solution

The correct option is B

may be correct


There are three terms in this equation v2,u2 and 2ax. The equation may be correct if the dimensions of

these three terms are equal.

[v2] = (LT)2=L2T2;

[u2] = (LT)2=L2T2;

and [2ax] = [a][x] = (LT2)L = L2T2

Thus, the equation may be correct.


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