Let's discuss a problem useful for Physics Olympiad based on Dimensional Analysis.
The Problem: Dimensional Analysis
Consider an expression F=Ax(sin^{-1} (Bt)) where F represents force, x represents distance and t represents time. Dimensionally the quantity AB represents
(A) energy
(B) surface tension
(C) intensity of light
(D) pressure
Solution:
The quantity Ax on RHS must have the dimensions of force since there is force on LHS. B must have dimension of reciprocal of time. Thenn, the product AB will have the dimensions of energy per unit area per unit time, the same as those of intensity of light.
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