Q: A book with many printing errors contains four different expressions for the displacement y of a particle executing simple harmonic motion. Which ones are wrong ?
(a) y = A sin (2π t/T)
(b) y = A sin υ t
(c) y = (A/T) sin (t/A)
(c) y = (A/√2) (sin ωt + cos ωt)
Find the wrong formulae on dimensional ground.
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Ans: (b) , (c)