A 188 Newton horizontal force is exerted upon a 2.8 kg box causing it to move it across a level surface at aconstant velocity. The force of friction encountered by the box isNewtons

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.