b)Newton assumed that upon striking a surface inclined at a angle 6 to the stream, the particles would transfer their normal momentum to the surface but their tangential momentum would be preserved. Hence, after collision with the surface, the particles would then move along the surface. This led to an expression for the hydrodynamics force on the surface which varies as sin 0
b) Newton assumed that upon striking a surface inclined at a angle to the stream, the particles would transfer their normal momentum to the surface but their tangential momentum would be preserved. Hence, after collision with the surface, the particles would then move along the surface. This led to an expression for the hydrodynamics force on the surface which varies as 2 sin
2. DAlembert The experiment results show: the rule that for oblique resistance varies with the sine square of the angle of the incidence holds good only for angle between 50 and 90 deg and must be abandoned for lesser angles
2. D’Alembert The experiment results show: the rule that for oblique resistance varies with the sine square of the angle of the incidence holds good only for angle between 50 and 90 deg and must be abandoned for lesser angles
3. Euler noted The fluid moving toward a body before reaching the latter, bends its direction and its velocity so that when it reaches the body it flows pass it along the surface, and exercise no other force on the body except the pressure corresponding to the single points of the contact
3. Euler noted The fluid moving toward a body “before reaching the latter, bends its direction and its velocity so that when it reaches the body it flows pass it along the surface, and exercise no other force on the body except the pressure corresponding to the single points of the contact
4. Real case for fluid approaching a body All the fluid particles are in random motion, and has a average velocity. During their motion, they collide with each other. The molecules strike on to the solid surface will be rebounded and these rebounded molecules will make collision to other molecules. This process transfers the message of the existence of the body and most of the particles will go other round After the collision between fluid particles and solid surface, the momentum change of the particles is in the perpendicular direction of the surface
4. Real case for fluid approaching a body All the fluid particles are in random motion, and has a average velocity. During their motion, they collide with each other. The molecules strike on to the solid surface will be rebounded, and these rebounded molecules will make collision to other molecules. This process transfers the message of the existence of the body, and most of the particles will go other round. After the collision between fluid particles and solid surface, the momentum change of the particles is in the perpendicular direction of the surface
o First flight of wright brothers DeC.17,1903
First flight of Wright brothers Dec. 17, 1903