ENGR 251 Midterm: ENGR 251 Midterm 2009 Winter A Solutions
Document Summary
Engr 233 - tut ua - solutions to 1st midterm exam, Determine the work done by the constant force ~f = 2 + 3 in moving a particle from the point ( 1, 1) to the point (4, 6) along a straight line. The displacement ~d is the vector from ( 1, 1) to (4, 6) so. ~d = (4 ( 1)) + (6 1) = 5 + 5 . Solution: we determine two of the edges of the triangle, expressed as vectors, for example between the rst two points (0, 1, 2), (1, 2, 3): ~a = (1 0) + (2 1) + (3 2) k = + + k and between the rst point (0, 1, 2) and the last point (3, 2, 1): ~b = (3 0) + (2 1) + (1 2) k = 3 + 1 1 k and take their cross-product.
