A particle is oscillating according to the equation $X = 7\cos 0.5\pi t$, where $t$ is in second. The point moves from the position of equilibrium to maximum displacement in time ..... $\sec$
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(c) From given equation$\omega = \frac{{2\pi }}{T} = 0.5\pi ⇒ T = 4\,sec$
Time taken from mean position to the maximum displacement $ = \frac{1}{4}T = 1\,sec.$
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