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in Physics by (50.3k points)

For a particle undergoing SHM, the displacement x is related to time t as x = A cos ωt. In the graphs given below, its potential energy (PE) is plotted against t (1st graph) and x (2nd graph). Two options are shown in each graph, marked as 1 and 2 in the 1st and as 3 and 4 in the 2nd. Which of these are correct?

(a) 1 and 3 

(b) 2 and 4 

(c) 2 and 3 

(d) 1 and 4

1 Answer

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by (51.1k points)
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Best answer

Correct Answer is: (d) 1 and 4

τ = W. 1/2 I α = (ml2/3) α

or α = 3W/2ml.

aCM = α. 1/2 = 3W/4m

W - N = maCM = 3W/4

or N = W/4.

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