QUESTION TWO

A tractor pulls a three bottomed mouldboard plough in a soil with specific strength of $70k\frac{N}{m^2}$ at a depth of $0\mathrm{.}25$ m $.$ The tractor travels at $6k\frac{m}{h}$ and the effective width of the plough is $0\mathrm{.}75$ meters. Calculate:$-$

a$)$ Traction needed by the tractor.

$(8$ Marks$)$

b$)$ The Drawbar Power

$(5$ Marks$)$

c$)$ The engine power needed at $70\%$ efficiency.

$(4$ Marks$)$