A.    The velocity has to change direction as the object turns around.
    B.    The object will not move if its acceleration is 0 m/s².
    C.    The object will slow down if its velocity and acceleration are opposite in sign.
    D.    The acceleration is 0 m/s² if the object is moving with a constant velocity.
    E.    It is possible for the object to have a negative displacement (from the origin), but a positive velocity.

    Ans.    B

V.

For the above v-t curve, at which of the following given time the object is decelerating (i.e. decreasing its speed) ?

    A.    t = 0.5s
    B.    t = 1.5s
    C.    t = 3s
    D.    t = 4.5s
    E.    t = 5.5s

    Ans.    C