Question $3$

A horizontal engine with reciprocating parts $)=(240kg$ has a crank radius of $320$ mm $.$ When the crank is $60$ from IDC, the pressure difference between the driving and back pressure is $0\mathrm{.}5\frac{N}{m}{m}^2.$ The connecting rod length is $1200$ mm $,$ the cylinder bore diameter is $500$ mm and the engine runs at $250$ rpm $.$ The effect of the piston rod diameter is neglected, determine:

a$)$ The pressure force.

b$)$ The inertia force.

$(3)$

c$)$ The piston effort.

$(2)$

$(2)$

$[7]$