The rigid beam a c ac is supported by a smooth pin b b, two rods at points a a and c c and is subjected to a load p p as illustrated below. the inclined rod ( 1 ) (1) has stiffness k 1 = 237 n / m m k1=237 n/mm, length l = 200 m m l=200 mm and inclination θ = 27 o θ=27o. the vertical rod ( 2 ) (2) has stiffness k 2 = 148 n / m m k2=148 n/mm and the same length l l. neglect the weight of the beam a c ac and assume that when p = 0 p=0 the rigid bar is in the horizontal position and the rods are stress-free. assume small rotations.

Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation