Canal Barge Problem: In the past, it was common to pull a barge with tow ropes on opposite sides of a canal (Figure 6-7f). Assume that one person exerts a force of 50 lb at an angle of 20 with the direction of the canal. The other person pulls at an angle of 15 to the canal with just enough force so that the resultant vector is directly along the canal. Find the force, in pounds, with which the second person must pull and the magnitude of the resultant force vector. Figure 6-7f
Chapter 10 Emotions and Motivation Instinct theory Born w/ all motivation Species specific Automatic response Drive theory Biological needs cause drive, we want to reduce drive o Ex) Need ex) food and water leads to drive ex) hunger and thirst leads to drive to reducing behavior ex) eat drink. Wasn’t specific enough. A lot of theory Arousal Theory Optimal level of arousal where we perform at our best or moderate range. Robert Zajonc (presence of others and its effects on performance)- difficultly of the task for others. Task is easy when the add presence of other people increase. Shooting free throws is hard task so adding people d
