$2.$A V$-$belt drive transmits $40$kw from a $300$mm pitch diameter sheave rotating at $1500$rpm to a$1100$mm diameter flat pulley as shown in figure $1.$ The centre distance between shafts is $2$m Thegroove angle is $42$ degrees and the c$0-$efficients of friction between the belt and the smal sheaveand the large pulley are D$3$ and $0\mathrm{.}25$ respectively The width of the belt is $40$mm at the top and$22$mmm a the bottom with a depth of $23$mm$,$ The mass of the helt is $0.6$ke$/$n and the allowabletension per belt is $800$N$.$ Determine the number of beits required.