Unformatted text preview: obj1 and F obj2 . W 6.0 Student tried to solve the entire problem only using sines/cosines/tangents, without any reference to force balance equations; student tried to write a single force balance equation, not splitting it into x and y components, or said that the MAGNITUDES of the two forces had to add up to 50N; student had only two of the three forces add up to 0; 50N=F 1 +F 2 +F 3 or similar. X 3.0 Too many errors; no significant progress made towards correctly solving the problem; student described or tried using the formulas v x =vcos( θ ), v y =vsin( θ ), v=(v x 2 +v y 2 ) ½ straight, without correct references to the problem. Z 0.0 Blank or effectively blank....
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 Fall '09
 COLEMAN
 Force, Mass, Expression, correct substitution

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