Answer :
The necessary condition for the object to move straight down is the magnitude of force C must be greater than the magnitude of forces A or B, so A < C > B.
Here's the complete question:
Three forces, A, B, and C, are acting on the same object with magnitudes a, b, and c, respectively. Force A acts to the right, force B acts to the left, and force C acts downward. What is a necessary condition for the object to move straight down?
A. The magnitude of force A must be greater than the magnitude of force C, so A > C.
B. The magnitude of force A must be greater than the magnitude of force B, so a > b.
C. The magnitude of force A must be equal to the magnitude of force B, so a = b.
D. The magnitude of force C must be greater than the magnitude of forces A or B, so A < C > B.
Three forces, A, B, and C, are acting on the same object with magnitudes a, b, and c, respectively. Force A acts to the right, force B acts to the left, and force C acts downward.
The force C must be greater than the two forces A and B acting on the right and left side of an object because the resultant of the force will move the object downward if the force at C will be greater then the other two forces.
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