Physics for IGCSE & O level - Forces And Motion (Section 1 - No. 12)
If an object's speed is constant, what does its acceleration equal?
1 m/s²
0 m/s²
9.8 m/s²
Constant, but not 0
คำอธิบาย
If the speed is constant, there's no change in velocity, so acceleration is 0.