A group of ENES 102 students has designed a toggle press to crush aluminum cans, for use in the ASME student lounge. The press consists of handle EFG, 3 bars (BD, CD, DE), and a piston at B that moves vertically within cylinder A. When an upward force P is imposed on the handle, a crushing force of 100 lb develops at the piston. Points B, C, D, E, and F are pinned connections. Assume smooth walls between the piston and cylinder. (a)Find the force P and the forces in members BD, CD, and DE. (b)Determine the mechanical advantage for this machine.

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.