The main difference between turbojets and rocket engines is the fact that a. turbojets carry their own supply of oxygen as oxidizers. b. turbojets are not dependent on oxygen from the air. c. rocket engines need oxygen from the air. d. rocket engines are not dependent on oxygen from the air.

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.