For the systems in equilibrium in the figure below, find the unknown tensions and masses. 60 60 80 N 30 N (a) (b) 60 T'3 60" 6kg (c)

An airplane flies at 300 km/h at sea level at 20°C. The propeller diameter is 1.8 m, and the velocity of the air through the propeller is 360 km/hr. Find: ( a) The slipstream velocity relative to the airplane. (b) The thrust. (c) The power input. (d) The power output. (e) The efficiency. (f) The pressure difference across the propeller disk.  

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Problem 9 A boxcar of length 9.9 m and height 2.4 M is at rest on frictionless rails. Inside the boxcar (whose mass when empty is 3000 kg) a tank containing 1700 kg of water is located at the left end. The tank is 1.1 m long and 2.4 m tall. At some point the walls of the tank start to leak, and the water fills the floor of the boxcar uniformly. Assume that all the water stays in the boxcar. After all the water has leaked out what will be the final velocity of the boxcar? (Take movement to the right as positive. Assume that the mass of the boxcar is evenly distributed.) Submit Answer Tries 0/8 What is the displacement of the boxcar 6 S after the water has settled in the bottom. (Take positive displacement as being to the right.) Submit Answer Tries 0/8