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Homework Help: I think my AP review book has an error. Can someone check?

  1. Mar 25, 2016 #1
    1. The problem statement, all variables and given/known data
    An object of mass m is allowed to slide down a frictionless ramp of angle θ and its speed at the bottom is recorded as v. If this same process was followed on a planet with twice the gravitational acceleration as Earth, what would be its final speed?
    2. Relevant equations
    The book used v = vo + (a)(t) to solve, but since it's based on distance, isn't v2 = (v0)2 +(2)(a)(Δx) necessary to solve it?

    3. The attempt at a solution
    Using the latter equation, simply plugging in 2gsinθ instead of gsinθ, v will increase by a factor of √2; the book solution however says the answer is 2.
  2. jcsd
  3. Mar 25, 2016 #2


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    Homework Helper

    I agree with you.
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