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) (A + B = C)
b) (A - B = C)
c) (A = B + C)
d) (A = B - C)

Answer 1

The necessary condition for the object to move straight down is (A + B = C).

Step-by-step explanation:

In order for the object to move straight down, the sum of the magnitudes of the forces acting in the horizontal direction (A and B) must be equal to the magnitude of the force acting in the downward direction (C). Therefore, the necessary condition is (A + B = C), so option a) is the correct answer.