Astudent pedaling a bicycle applies a net force of 400 n. the mass of the rider and the bicycle is 25 kg. what is the acceleration of the bicycle and the rider?

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.