As tlustrated in Figure $1,$ a double long$-$shoe external brake operates a drum with a diameter of $200$ mm $.$ The coefficient of friction from the brake Iining is $0,3,$ and the face with of the shoe is $50$ mm $.$ If the actuating force is $600N,150rpm$

$4\mathrm{.}1$ Determines the braking torque and heat generation on the braking shoes.

$[11]$

$4\mathrm{.}2$ Maximum pressure on each braking shoe.

$[4]$

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Figure $1$ I Double long$-$ahce eriernal oumbrake.