Acircular disc with a radius of gyration of 200 mm and a mass of 15 kg is rotating in the clockwise direction with an angular velocity of 5 radians per second. from the time t=0 seconds if the disc is subjected to a counterclockwise moment of 9t, where t is the time in seconds, deternmine the direction and magnitude of angular velocity of the disc at time t=10 seconds.

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.