A mechanic exerts a force of 55 N on a 0.015 m2 hydraulic piston to lift a small automobile. The piston that the automobile sits on has an area of 2.4 m2. What is the weight of the automobile?

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.