The following diagram represents a cart with an initial velocity of 1.0 m/s sliding along a frictionless track from point A: At which two points will the kinetic energy of the cart be the same? 1). A and B 2). A and C 3). B and D 4). B and C

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.