1. A peregrine falcon is the fastest animal in the world. When it dives, it can accelerate to about 40 m s. a) Express this speed in km h. b) The bird's acceleration is about 8 m s. Calculate the length of time the bird needs to get to its top speed from rest. c) A graph of the vertical speed against time for one bird's dive is shown below. Calculate the distance the bird falls through during its dive. 25 20 15 vertical speed (m s-1) 10 0 2 3 4 5 time (s)