Which of the following statements is true? (Give all correct statements in order

Question

Which of the following statements is true? (Give all correct statements in order;i.e. AD, BCD, etc.)

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

I need to know which statements are correct. An explanation would also be appreciated.

Explanation / Answer

A) An object with a constant speed always has zero acceleration.

False , as the direction of object may be changing

B) The velocity of an object can reverse direction when its acceleration is constant.
True as there is some acceleration

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

True.. as in the case of object at the highest point
D) If the vector sum of two velocities is zero, then the magnitudes of those two velocities are equal

True as for two vectors to have a sum of zero , there magnitude must be equal

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

False. for costant velocity
average velocity = instant. velocity

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