A body of mass 2 ~kg is moving with a constant acceleration of (2 i +3 j - k ) ms ⁻² . If the displacement made by the body is (3 i - j +2 k ) m then the work done is

Step-by-step solution

aligned & Mass of body, m=2 ~kg & acceleration, a=2 i +3 j - k & displacement, s =3 i - j +2 k & work done, W=F S & =m a s & =2(2 i +3 j - k )(3 i - j +2 k ) & =2[6-3-2]=2 J aligned