Assuming it takes about 1.5 s for a driver having 0.02% alcohol in his/her system to react to a situation to avoid a collision. if such driver is traveling on a straight road at 50 mph, and the vehicle can decelerate at 2.5 ft/s2. determine the shortest stopping distance from the moment the driver see a pedestrian [hints: (a) convert miles per hour (mph) to ft/s.; (b) know that at stopping distance, final velocity is zero; (c) obtain initial distance before reaction].

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?

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.