

To see more about GOALOriented Problem Solving and the supporting research see Online Articles: Robert Beichner.
For more information about Teaching Students to Solve Quantitative Physics Problems by Writing Their Way Into the Solution, contact Calvin S. Kalman.
The solution presentation shown emphasizes importance of gathering information in a coherent manner. The guiding idea is the NEEDTOKNOW. For the case at hand we need to know the acceleration of the bucket. By simply asking "How would I find out?" Newton's law of motion provides an appropriate response. Now we NEEDTOKNOW the net force. The idea of a freebody diagram provides a response. The process is continued, each step being a consequence of the previous step and a precursor to the next step. Problem solve themselves.