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March 30, 2017

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a ball is dropped from a height of 100 ft. Each time it hits the floor, it rebounds to 2/3 its previous height. Find the total distance traveled.

  • calculus II - ,

    Calculate the limit of the series

    100[1 + 2*(2/3) + 2*(2/3)^2 + 2*(2/3)^3+...]
    = 100 + 2[1 + 2/3 + (2/3)^2+ ...]

    Make use of the relation:
    1 + x + x^2 + .. = 1/(1-x)
    (for x<1, which is the case here)

  • calculus II (correction) - ,

    = 100 [1 + (4/3)[1 + 2/3 + (2/3)^2+ ...]
    = 100 {1 + (4/3)[1/(1 - 2/3)]} = ?

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