This is a kinematics exercise on uniformly varied rectilinear motions (MRUV).
To solve this exercise we do it with the following data:
Final speed (Vf) = 0 m/s
Initial Velocity (Vo) = 3 m/s
Time (T) = 2 sec
To calculate the acceleration, we apply the following formula:
We substitute our data into the formula and solve for the acceleration:
Answer: The acceleration is 1.5 m/s².✅