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PhysicsQ&A LibraryMary and sally are in a foot race. When mary is 22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m behind Sally, who has a speed of 5.0 m/s. Sally thinks she has an easy win and so, during the remaining portion of the race, decelerates at a constant rate of 0.40 m/s^2 to the finish line. what constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by-side with sally?Question

Asked Aug 27, 2019

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Mary and sally are in a foot race. When mary is 22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m behind Sally, who has a speed of 5.0 m/s. Sally thinks she has an easy win and so, during the remaining portion of the race, decelerates at a constant rate of 0.40 m/s^2 to the finish line. what constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by-side with sally?

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