An object of mass $0.5 \mathrm{kg}$ is executing simple harmonic motion. It amplitude is $5 \mathrm{cm}$ and time period (T) is $0.2 \mathrm{s}$. What will be the potential energy of the object at an instant $\mathrm{t}=\frac{\mathrm{T}}{4} \mathrm{s}$ starting from mean position. Assume that the initial phase of the oscillation is zero.

• Correct answer
  A

  $0.62 \mathrm{J}$
• B

  $6.2\times {10}^{-3} \mathrm{J}$
• C

  $1.2\times {10}^3 \mathrm{J}$
• D

  $6.2\times {10}^3 \mathrm{J}$

Hence, the correct answer is option: 'A'.