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Four successive displacements of 4 km, 5 km, 4 km, and 2 km are at right angles to each other as shown in the diagram. The magnitude of the resultant displacement is 5. 5 km 4 km 4 km 2 km A. 4 km B. 15km C. 3km D. -5 km E. -15 km 6. The graph shows how the position of a particle depends on time. x, m 4 2 4 6 8 t,s Which choice is closest to the average speed of the particle in the time interval between 0 and 6 s? A. 0.40 m/s B. 0.67 m/s C. 0.75 m/s D. 1.50 m/s E. 2.22 m/s

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сс 6 sleead 70 匕 2

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