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 force F=5i+3j moves an object from point P = ( -2 , 3 ) to point Q = ( 1 , 6 ).
2. Given thati = (1, 0) and j = (0,1), u= 2i +j, w= 3i+4j and v = i-3j
find,
a) u . v + u .w
b) (u.v)(u.w)