Conceptual Questions Remember to explain all your answers in order to receive ll] credit. 1. (2 pt) A person whirls a metal sphere attached to the end of a cord in a vertical circle. Assuming the speed of the sphere is constant (an approximation), when would the tension in the cord connected to the sphere be greatest? Explain your answer. (a) At the top of the circle. (17) A little after the bottom of the circle when the ball is climbing. (c) At the bottom of the circle. (d) A little before the bottom of the circle when the ball is descending quickly. (e) Nowhere; the cord is stretched the same amount at all points. 2. (2 pt) Will the acceleration of a truck be the same when it travels around a sharp curve at a constant speed of 50 mi/h as when it travels around a gentle curve at the same speed? Explain. 3. (4 pt) An off-road vehicle maintains a constant speed v as it traverses the hill and valley shown in the picture. Both the hill and valley have a radius of curvature R. At which point, A, B, or C, is the normal force acting on the vehicle (a) the largest, (b) the smallest? Explain. (0) Where would the driver feel heaviest and (d) lightest? Explain. Grading: 1 pt for each answer. Full credit for naming the correct in parts (a) ((1), even without explanation