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-15.A 2.5 tonne ute travelling north at 66 km h¹ collides with a 3.5 tonne truck moving west at 51 km h . If the vehicles stick together after the collision, determine the speed and direction the wreckage moves off at after the collision. (a) determine the speed and direction the wreckage moves off at after the collision. (b) Determine the energy loss in the collision.

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