Which of the following statements is true? (Give all correct answers, i.e., A, C

Question

Which of the following statements is true? (Give all correct answers, i.e., A, C, AE, ABCD . . .)

A) When the velocity is constant, the average velocity over any time interval does not differ from the instantaneous velocity at that instant.
B) The velocity of an object can reverse direction when its acceleration is constant.
C) If an object's acceleration is negative, its velocity must also be negative.
D) If the vector sum of two velocities is zero, then the magnitudes of those two velocities are equal.
E) An object can have a zero velocity and still be accelerating.

Explanation / Answer

A) When the velocity is constant, the average velocity over any time interval does not differ from the instantaneous velocity at that instant.

TRUE
B) The velocity of an object can reverse direction when its acceleration is constant.

FALSE
C) If an object's acceleration is negative, its velocity must also be negative.

FALSE
D) If the vector sum of two velocities is zero, then the magnitudes of those two velocities are equal.

FALSE
E) An object can have a zero velocity and still be accelerating.

TRUE

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