Rubric for a Net Force Problem Solution

Section Attribute Relative weight
Set up

  1. Picture, including directions of acceleration and velocity

  2. Directions of +x and +y selected appropriately and indicated

  3. Given and goal labeled and presented

  4. Force diagram, including labeled forces (W or mg, N, f, T). Not allowed: Net force (Fnet) and apparent force (Fapp).

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Solution

  1. Net force equation in the form , where is replaced with the algebraic sum of the forces shown on the force diagram.

  2. Substitution of Newton's 2nd law, Fnet = ma

  3. Algebraic solution for the unknown

  4. Substitution of numerical values with units and final result given

  5. Checks provided

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