For this case what we should do is use the given equation: F = mg sin (theta) And replace the following values: m = 0.01 kg g = 9.8m / s ^ 2 theta = 22.5 degrees Substituting we have: F = (0.01) * (9.8) * sin (22.5) F = 0.037502976 N Answer: The force pulling on the pendulum when it makes a 22.5 degree angle with the vertical is: F = 0.037502976 N
