(Figure 1) shows two different situations where three forces of equal magnitude are exerted on a square board hanging on a wall, supported by a nail. Determine the sign of the total torque that the three forces exert on the board in case (a).
positive
negative
total torque is zero

Determine the sign of the total torque that the three forces exert on the board in case (b).
positive
negative
total torque is zero

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Explanation:

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

get the total number of pieces of fruit and divide it by 4 to get the average. the result is the answer to the problem. 14 total number of fruits and there are 4 members. 14 divided by 4 is equals to 3.5.