B. The object moves forward at 1 cm/s, stops, and then increases velocity to 2 cm/s.
Velocity of the object between 0 to 3 s
Velocity = change in position / change in time
Velocity = (3 cm - 0 cm)/(3 s - 0 s)
Velocity = 1 cm/s
The displacement of the object between 3 seconds to 6 seconds is zero (0).
Velocity of the object between 6 to 10 s
Velocity = (11 cm - 3 cm)/(10 s - 6s)
Velocity = 2 cm/s
Thus, the object moves forward at 1 cm/s, stops, and then increases velocity to 2 cm/s.
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