A position dependent force f=(7-2x+3x^(2))N acts on a small body of mass 2 kg and displaces it from x=0 " to " x=5m. Work done is

A position dependent force f=(7-2x+3x^(2))N acts on a small body of ma

1.	A position dependent force f=(7-2x+3x^(2))N acts on a small body of mass 2 kg and displaces it from x=0 " to " x=5m. Work done is
Answer» (a) 35J (B) 70J (c) 135J (d) 270J Solution :`W=underset(x_(1))overset(x_(2))intFdx=underset(0)overset(5)INT(7-2x3x^(2))dx=[7x-x(2)+x^(3)]_(0)^(5)=135J`