Question

A cameraman on a pickup truck is traveling westward at 20 km/h while he videotapes a cheetah that is moving westward 30 km/h faster than the truck. Suddenly, the cheetah stops, turns, and then runs at 45 km/h eastward, as measured by a suddenly nervous crew member who stands alongside the cheetah's path. The change in the animal's velocity takes 2.0 s. What are the (a) magnitude and (b) direction of the animal's acceleration according to the cameraman and the (c) magnitude and (d) direction according to the nervous crew member?

Answer 1

direction and magnitude of accn. acc. to camera man and crew member will we same and it will we 45km/hr in eastward direction

average accn.=(final acc.-initial accn.)/time taken
=(45i^-(-50i^)/2
=45 m/sec sq. i^
and we ve taken i^ as eastward as mention in avove graph
sinse photographer and crew members have zero acc. relative acc. of cheeta in their reference will we same

Answer 2

well the answer is 13m/s^2

Answer 3

for a