Draw a free body diagram of the boom. Apply the equilibrium equations to determine the force of the spring. Also, calculate the horizontal and vertical components of the force at the pivot point. Read the value on the spring scale. Regardless, they are read by observing the top position of the marker.
Calculations Compare the theoretical value for the force on the spring to the experimental reading.
Explain your methods and estimations. See figure 2, but note that the numbers may not correspond to your arm. Performed this step for at least one lab member.