In a new lab experiment, you find the spring constant of a "good" and "bad" spring. The "bad" spring is exactly the same as the "good" spring, except that it has been permanently deformed by misuse. If you find the "good" spring to have a spring constant of 9.80 N/m and the "bad" spring to have a spring constant of 4.44 N/m, what was the percent change in the spring constant caused by deforming the spring?

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.