06 Feb A mother and her child are skiing together, with t
A mother and her child are skiing together, with the mother holding the end of a rope tied to the child’s waist. They are moving at a speed of 7.2 km/h on a flat portion of the ski trail when the mother observes that they are approaching a steep descent. She decides to pull on the rope to decrease the child’s speed. Knowing that this maneuver causes the child’s speed to be cut in half in 3 s and neglecting friction, determine (a) the mother’s speed at the end of the 3-s interval, (b) the average value of the tension in the rope during that time interval.
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