Question

if X is the depression produced in the middle of a beam of length L, breadth B and thickness D and a load of mass M is attached at the centre of the beam . If Y is the Young's modulus of the material , which of the following is dimensionally correct?​

Answer 1

Answer:

Here's the solution.

For dimensional formulas, if you know the unit of the physical quantity, then you can write the dimensional formula very easily.

For e.g. for g, we know that it's unit is m/s^2 , so it's formula is [LT^(-2)]

I hope you know about Young's Modulus. It is the ratio of Strain to Stress.

Y has the same dimensions as that of pressure.

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