If an object's speed remains the same but its direction changes, which quantity changes?

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Multiple Choice

If an object's speed remains the same but its direction changes, which quantity changes?

Explanation:
Velocity is the quantity that changes. It’s a vector, meaning it has both magnitude (speed) and direction. If you keep the speed the same but alter the direction, the velocity changes because its direction component has changed. Think of a car turning a corner at the same speed—the speedometer reads the same, but the motion’s direction is different, so the velocity is different. Distance and time don’t describe this change in motion’s direction in the same way; distance increases as you move, and time passes regardless of direction change.

Velocity is the quantity that changes. It’s a vector, meaning it has both magnitude (speed) and direction. If you keep the speed the same but alter the direction, the velocity changes because its direction component has changed. Think of a car turning a corner at the same speed—the speedometer reads the same, but the motion’s direction is different, so the velocity is different. Distance and time don’t describe this change in motion’s direction in the same way; distance increases as you move, and time passes regardless of direction change.

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