Question

a pigeon is flying forward at a speed of 2.1 m/s. at mid-downstroke, the wingtip is moving at 6.3m/s downwards. if the entire wing's chord is aligned with the flow direction (pitch angle is zero), what is the effective wind velocity felt at the wing tip during mid-downstroke? give your answer in m/s rounded to 2 decimal places.

Answer 1

To find the effective wind velocity felt at the wing tip during mid-downstroke, we use the concept of relative velocity. The effective wind velocity is obtained by subtracting the downward velocity from the forward velocity. In this case, the effective wind velocity felt at the wing tip during mid-downstroke is -4.2 m/s.

Step-by-step explanation:

To find the effective wind velocity felt at the wing tip during mid-downstroke, we can use the concept of relative velocity.

Relative velocity is the vector difference between the velocity of an object and the velocity of another object or reference point. In this case, we need to find the relative velocity between the wind and the wing tip.

Since the bird is flying forward at a speed of 2.1 m/s and the wingtip is moving downwards at 6.3 m/s, the effective wind velocity felt at the wing tip can be found by subtracting the downward velocity from the forward velocity.

Therefore, the effective wind velocity felt at the wing tip during mid-downstroke is 2.1 m/s - 6.3 m/s = -4.2 m/s.