A product with a shape of a conical frustum is to be injection moulded using a sprue gate at the middle A$.$ The schematic shows the section view created by the front plane.

If the pressure at the gate is $P_o=140$MPa and material loss coefficient constant $m=0\mathrm{.}4,$ estimate

a$.$ The flow ratio

b$.$ The clamping force required using a cavity pressure distribution method. The pressure at any radial location of the projected area of the part is given as$,$

$P_r=P_o(1-(\frac{r}{R_o}{)}^m)$

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