Question on: JAMB Physics - 2024
When a bus is accelerating, it must be
A
changing its speed
B
changing its velocity
C
changing its position
D
changing its direction
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Correct Option: B
The correct answer is B. changing its velocity.
Reasoning:
Acceleration is defined as the rate of change of velocity. Velocity is a vector quantity, meaning it has both magnitude (speed) and direction. Therefore, acceleration occurs when there is a change in either the speed or the direction of motion, or both.
- A. changing its speed: While changing speed is a form of acceleration, it's not the complete definition. Acceleration also includes changing direction.
- B. changing its velocity: This is the most accurate answer because it encompasses changes in both speed and direction.
- C. changing its position: Changing position describes motion, but it doesn't necessarily indicate acceleration. Constant motion also involves changing position.
- D. changing its direction: Changing direction is a form of acceleration, but it does not tell the full story.
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