To protect their young in the nest, peregrine falcons will fly into birds of pre

Question

To protect their young in the nest, peregrine falcons will fly into birds of prey (such as ravens) at high speed. In one such episode, a 630 g falcon flying at  19.0 m/s hit a 1.40 kg raven flying at 8.0 m/s . The falcon hit the raven at right angles to its original path and bounced back at 5.0 m/s . (These figures were estimated by the author as he watched this attack occur in northern New Mexico.)

1) By what angle did the falcon change the raven's direction of motion? Express your answer using two significant figures.

2) What was the raven's speed right after the collision? Express your answer using two significant figures.

Explanation / Answer

In the falcon's direction of motion,
630g * 19.0m/s = 630g * -5.0m/s + 1400g * v
v = 10.8 m/s

Relative to the raven's original direction, then,
= arctan(10.8/8.0) = 53.47º A

speed = (8.0² + 10.8²) m/s = 13.44 m/s B

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