Relating acceleration and velocity in two dimensional motion

1. Relating Acceleration and Velocity in Two-Dimensional Motion An object moves clockwise with decreasing speed around an oval track. The velocity vectors at points G and H are shown below. Top view A. Determine the change-in-velocity vector Av for the object as it moves from point G to point H. Show your work to earn full credit. B. Describe how you would find the average acceleration dave for the object as it moves from point G to point H. In what direction does it point (draw it in comparison to UG and UH ? C. If point H were chosen to lie closer to point G, describe how Av would change. Support your conclusion with a sketch . D. Describe how you would find the (instantaneous) acceleration a for the object at point G. In what direction does it. point (draw it in comparison to VG)? Is the angle between the acceleration and the velocity greater than, less than, or equal to 90? E. Based on this example and the examples we considered in the tutorial exercises answer the following question: For an object moving along a curved trajectory, how does the angle between the acceleration and the velocity compare to 90 if the object moves with i. constant speed ii. increasing speed, and iii. decreasing speed