There is a tree in the middle of your front yard and you take pictures of a squirrel as it runs around the tree. When you take the first picture, the squirrel is 12 m away from the tree in the direction 30 degrees N of E moving with a speed of 1.8 m/s due east. Twelve seconds later, you take a second picture and the squirrel is 7.5 m away from the tree in the direction 15 degrees E of S moving due north with a speed of 1.5 m/s. After an additional 15 seconds, you take a third picture when the squirrel is 9.5 m away from the tree in the direction 25 degrees W of S moving with a speed of 2.5 m/s due west.
a) what is the displacement of the squirrel between the first and second pictures?
b) what is the average velocity of the squirrel between the second and third pictures?
c) what is the average acceleration of the squirrel between the first and third pictures?