If the acceleration of an object is known to be 2m / S2 and remains unchanged, the final velocity of the object () A. It must be 2 times of the initial velocity. B. it must be 2 m / s higher than the initial velocity. C. It must be 2 m / s higher than the final velocity in the first second. D. It must be 2 m / s higher than the initial velocity in the first second

If the acceleration of an object is known to be 2m / S2 and remains unchanged, the final velocity of the object () A. It must be 2 times of the initial velocity. B. it must be 2 m / s higher than the initial velocity. C. It must be 2 m / s higher than the final velocity in the first second. D. It must be 2 m / s higher than the initial velocity in the first second

A. If the acceleration is 2m / S2, the final velocity of the object is not equal to 2 times of the initial velocity, so a is wrong; B. if the object is accelerating in a straight line, the acceleration is 2m / S2. From △ v = at, the final velocity must be 2m / s higher than the initial velocity in any one second, so B is correct; C. if the object is accelerating in a straight line, the acceleration is 2m / S2