1. Work done is the product of the force and the distance travelled in the direction of the force. Calculate the work done when the forceF=5i+3jmoves an object from pointP= ( -2 , 3 ) to pointQ= ( 1 , 6 ).

2. Given thati = (1, 0)andj = (0,1),u= 2i+j,w= 3i+4jandv=i-3j

find,

a)u . v + u .w

b)(u.v)(u.w)