An object moves +4 m/s for one minute. then it turns around and moves-4
m/s. what had to change during the time the object reversed its direction?
oa) only its speed
ob) only its velocity
oc) both its speed and its velocity
od) neither its speed nor its velocity

B. only its velocity

Explanation:

Only the velocity of the object had to change during the time the object reversed its direction.

The speed of an object is the amount of distance covered by the object within a specified time. The speed of an object is considered a scalar quantity because it has magnitude but no direction.

The velocity of an object is the speed of the object in a specific direction. It is a vector quantity because it has both magnitude and direction.

Hence, an object that speeds +4 m/s and then turn around to move -4 m/s has the same speed which is 4 m/s. However, the direction has changed from + to -, therefore, the velocity has changed from +4 m/s to -4 m/s.

The correct option is B.

bcde is the incorrect answer it is a