Answer Happy

= 70° A loaded cement mixer truck drives onto an old drawbridge (length = = 40m and Mbridge = 18,000kg) where it stalls with the truck's center of gravity three quarters of the way across the span. The truck sets its brakes such that it won't move and the bridge is raised by means of a cable attached at the end of the bridge. The truck (and driver) have a mass 30,000kg. When the bridge has been raised by 30°, the cable forms an angle of 70° and all motion is stopped. K10.0 m 40.0 m -L30 of mtruck a) Draw an extended free body diagram (not for a point mass) for the bridge showing all the forces acting on the bridge. Be sure to indicate the point of application of the force and be sure to label all the forces. (5 points) b) Determine the tension † needed to maintain this position. (9 points) c) What are the horizontal and vertical components of the force the hinge exerts on the span of bridge? (6 points)