2. Do the following statements make sense? Explain in the right column. A truck moves in the positive direction so its velocity is negative. A child moves in the positive direction, his velocity is positive and acceleration is positive. He must be slowing down. A ball falling under the influence of gravity only has an acceleration of 3.34 m/s. You throw a ball straight up. When it reaches its maximum height, its acceleration is 0. 3. 4.9t +2.4t - 34= 0. Solve for t. Use quadratic equation.