The retardation is defined as:
Correct answer: B. Decrease in velocity per unit time
- A. Increase in velocity per unit time
- B. Decrease in velocity per unit time
- C. Decrease in speed per unit time
- D. Increase in speed per unit time
Explanation
Retardation (deceleration) refers to a negative acceleration, i.e. a decrease in velocity per unit time. Velocity is a vector, so retardation can involve reductions in magnitude or changes in direction that reduce the velocity component.
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