A wire of cross section 4mm2 is stretched by
0.1mm by a certain wieyht. The extension produced
on a wire of some meterial of same length
and area 8mm² is​

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.