Question

A body oscillates with SHM according to the equation (in SI units), $x = 5 cos \left(2\pi t +\frac{\pi}{4}\right) .$ Its instantaneous displacement at $t = 1$ second is

• A. $\frac{\sqrt{2}}{5} m$
• B. $\frac{1}{\sqrt{3}} m$
• C. $\frac{1}{\sqrt{2}} m$
• D. $\frac{1}{2} m$
• E. $\frac{5}{\sqrt{2}} m$

Answer 1

Answer: (E)

$\frac{5}{\sqrt{2}} m$

Answer 2

Answer (e) $\frac{5}{\sqrt{2}} m$