A particle, whose acceleration is constant, is moving in the negative x direction at a speed of 4.86 m/s, and 13.7 s later the particle is moving in the positive x direction at a speed of 7.08 m/s.
a. What is the particle’s acceleration in m/s²?
b. What is the particle’s velocity, in m/s, 13.7 s before it was moving in the negative x direction at a speed of 4.86 m/s?
c. When is the particle at rest? Express this answer as a time in seconds elapsed since it was moving in the negative x direction at a speed of 4.86 m/s?