A 60,000 kg airplane is cruising with an angle of attack of 8o and a velocity of 140 m/s at a high altitude where air density is 0. 8 kg/m3. It is operated with no-flap wings having a planform area of 130 m2. (12 marks) (a) Determine lift force (in kN), drag force (in kN), and the power required to overcome drag (in kW) (b) To achieve maximum lift and avoid engine stall, what is the maximum angle of attack that can be increased to (in degree)? What are the minimum velocity (in m/s)? What is the safe minimum velocity (based on the Federal Aviation Administration) (in m/s)?.

Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.

Explain the consequences of this addiction to the brain tissue