A particle performs SHM along a straight line with the period I and amplitude A. The mean velocity of the particle averaged over the time interval during which it travels a distance A/2 starting from the extreme position is:

• A

  $\frac{\mathrm{A}}{2\mathrm{T}}$

• B

  $\frac{\mathrm{A}}{\mathrm{T}}$

• C

  $\frac{2\mathrm{A}}{\mathrm{T}}$

• D

  $\frac{3\mathrm{A}}{\mathrm{T}}$