A particle moves along the x-axis, and the acceleration is in the same direction as the velocity. In the process of gradually decreasing the acceleration value to zero, regarding the movement of the particle, which of the following is correct?
A. Speed ​​always decreases
B. Speed ​​increases first and then decreases
C. Speed ​​always increases
D. Speed ​​decreases first and then increases
Answer:C
A particle moves along the x-axis, and the acceleration is in the same direction as the velocity. In the process of gradually decreasing the acceleration value to zero, regarding the movement of the particle, which of the following is correct?
A. Speed ​​always decreases B. Speed ​​increases first and then decreases C. Speed ​​always increases D. Speed ​​decreases first and then increases