1.

Calculate difference in work done in process -I to process -II. (Given : pi =3)

Answer»


Solution :Process -I : `W_(ABCDAEFD)=W_(ABCDA)+W_(AE)+W_(EF)+W_(FD)`
`=- (2xx2 +(3xx1xx1)/(2)) + (3xx1xx1)/(2)+8xx 2+0 =-5.5 +(3)/(2)+16 =12`
Process - II`W=((3XX 2xx2)/(2)+4xx2) = - (6+8)=- 14 `
Diffrence in workdone= 12 -(-14)= 26


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