9-18. A simply supported beam is subjected to a quadratic distributed load as shown in Fig. P9.18. y w(x) = - Wo x(x-21) Wo X. -1 Figure P9.18 Simply supported beam subjected to a quadratic distributed load. (a) Determine the total resultant force, 1. w(x) dx. %3D (b) Determine the x-location of the resultant R; in other words, deter- mine the centroid of the area under the distributed load | xw(x) dx sdrome R II 18

Part 1. Using the simulator "Explore 2D option". Activities. 1.1) Using the simulator, Explore 2D, and given the value for vectors a, b and c, represent all vectors in the simulator and complete the data table 1, show all formulas and calculations. 1.2) Attach the diagram to the lab report with three vectors and their components. 1.3) In which quadrant are the vectors a, b and c. Describe the signs of its components. Could you establish some rule about their signs? Explain. Table 1.EXPLORE 2D Vector a Vector b Magnitude Direction Magnitude Direction 23.3 59° 25 143.1° Component X Component y Vector c Magnitude 13.9 Direction -159

2. Round off to FOUR DECIMAL PLACES for all calculations made.

I am confused because on my homework i got marked wrong for this, unless I used to many sig figs.