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Homework Help: How much work was done on the mass?

  1. Mar 16, 2008 #1
    1. The problem statement, all variables and given/known data
    A 1.20 x10^3-kg block starting from rest is accelerated by a 2.20x10^3-N force for a distance of 50.0 meters along a horizontal frictionless surface.

    a. What is the final velocity of the mass?

    b. How much work was done on the mass?

    I have no clue how to get A but for B i just Used W=Fd and got 2.20x10^3-N * 50m =
    0.11 (Nm)

    Can someone confirm my answer to B and help me with A?

  2. jcsd
  3. Mar 16, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Correct formula, but redo that arithmetic. (Keep better track of the exponents.)

    For A, either find the acceleration and use kinematics or use the result of part B and relate the work done to the kinetic energy.
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