Which of the following are scientific hypothesistides are caused by the moon,earth rotates around it's axis because living things need an alternation of light and darkness,chlorophyll makes grass green

F = 32.28 N

Explanation:

For this exercise we must use the rotational equilibrium relation

          Σ τ = 0

In the initial configuration it is in equilibrium, for which all the torque and forces are compensated. By the time the payment lands on the bar, we assume that the counter-clockwise turns are positive.

          W_bird  L / 2 - F_left 0.595 - F_right 0.595 = 0

we assume that the magnitude of the forces applied by the hands is the same

          F_left = F_right = F

          W_bird L / 2 - 2 F 0.595 = 0

          F =

we calculate

         F = 0.560 9.8 14.0 /2.38

         F = 32.28 N