A particle of mass m moving with a velocity u makes an elastic one dimensional collision with a stationary particle of mass m establishing a contact with it for extremely small time T. Their force of contact increases from zero to F₀ linearly in time $\frac{\mathrm{T}}{4}$, remains constant for a further time $\frac{\mathrm{T}}{2}$ and decreases linearly from F₀ to zero in further time $\frac{\mathrm{T}}{4}$ as shown. The magnitude possessed by F₀ is

• A

  $\frac{\mathrm{mu}}{\mathrm{T}}$

• B

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

• C

  $\frac{4\mathrm{mu}}{3\mathrm{T}}$

• D

  $\frac{3\mathrm{mu}}{4\mathrm{T}}$