A car rounding a corner at constant speed is accelerating because:
AIts mass is changing
BIts speed is changing
CIts weight is changing
DIts direction is changing
Answer & Solution
Correct answer: D. Its direction is changing
1. Acceleration is a change in velocity, and velocity carries a direction.
2. If a car turns a corner at constant speed, it is accelerating because its direction is changing.
3. Acceleration is therefore a change in either speed or direction, or both.
4. Constant speed rules out only one of those two ways to accelerate.
_Source: OpenStax College Physics for AP(R) Courses 2e (CC BY 4.0), Ch 2 'Kinematics', sections 2.1-2.8_
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