Question

Constants Any event can be considered from different perspectives. In particular, the description of the motion of a given object would depend on the motion of the person describing the motion, the observer. Any such observer, equipped with a coordinate system anda stopwatch, forms a trame of reterence. Usually, we assume that a trame of reterence is attached to some object. For instance, "the trame of reterence of earth" means the observer is at rest relative to earth. In this problem, y viewing motion and calculating its parameters in different frames of reference. The rules of vector addition and subtraction will be useful here. To denote the velocities in different frames use the following notation you will practice of reference, we will vpo means "the velocity of object P in the frame of reference (or with respect to, or relative to) object Q." Consider four cars: A, B, C, and D. The cars are moving along a straight stretch of a road, their velocities are shown in the diagram 12 ms 15 m/s 20ms The first several questions refer to this diagram. Part A Consider the statement of the problem: ".. the cars'] velocities are shown in the diagram. It is reasonable to assume that the velocities on the diagram are given relative to which o of the following? earth car E (not shown in the diagram) the sun Part B What is UAB? 12 mis to the right 12 m's to the len Submit

Answer 1

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i have solve 5 part instead of 3

part F AND G are not visible

Part A The velocity is measured reference to Earth Part B V_AB = V_A - V_B = 12 - 0 12m/s to the right Part C V_BA = V_B - V_A = 0 - 12 = - 12m/s 12m/s to the left Part D yes By Knowing when, they are going to meet Part E V_AC = V_A - V_C = 12 - (- 15) = 27 V_AC = 27m/s to the right