Jack and Jill are maneuvering a 3100 kg boat near a dock. Initially the boat's position is < 2, 0, 3 > m and its speed is 2.0 m/s. As the boat moves to position < 8, 0, 0 > m, Jack exerts a force of < -450, 0, 225 > N, and Jill exerts a force of < 180, 0, 360 > N. How much work does Jack do

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the