Q. What is the net upward force on an airplane wing of area 16.1 m2 if the speed of air flow is 294 m/s across the top of the wing and 278 m/s across the bottom?
Q. 1. The 30kg sack A is dropped on a spring scale from the height h=0. The platform B of the scale weighs 6 kg and the combined stiffness of the springs is 2000 N/m. Determine the maximum reading of the scale.
2. The 60kg cradle A is carrying the 12 kg pipe B at the speed of 8 m/s when it hits the rigid wall. Assuming all the impacts are plastic, determine the speed of the pipe immediately after the impacts. Neglect friction.