The seed pods of maple trees, also known as "helicopter seeds," spin as they fall, generating a leading edge vortex at the outer edge of each wing-like seed pod. This effect, similar to the vortices generated by hummingbird wings, can generate a sufficient lift force to keep the seed floating in air, allowing it to be dispersed by the wind. The figure below shows a pair of maple seeds L = 3.40 cm in length, with an angle of = 70.0° separating the seeds, as shown. If the outer edge of the seeds must rotate with a speed of 1.25 m/s for sufficient lift to be generated, what is the centripetal acceleration of the outer edge of the seeds (in m/s2) as they fall? (Enter the magnitude. Assume the seeds are symmetric about the vertical axis as they fall, as in the figure.)
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
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