What is one limitation of using the jawbreaker as a model for earth's layers? a. the layers are all made out of the same material. b. the outside layer is the thinnest layer. c. the jawbreaker has four different layers. d. the jawbreaker can be split to show the inside.

The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.