If the velocity of the body changes by equal amount in equal intervals of time, the body is said to have:
Correct answer: B. Uniform acceleration
- A. Variable acceleration
- B. Uniform acceleration
- C. Uniform velocity
- D. Negative acceleration
Explanation
The correct answer is uniform acceleration. This is because the definition of uniform acceleration is when the velocity of a body changes by equal amounts in equal intervals of time, indicating a consistent rate of change in velocity.Option A is incorrect because variable acceleration involves changes in velocity that are not consistent over time.Option C is incorrect because uniform velocity implies no change in speed, which contradicts the condition of changing velocity.Option D is incorrect because negative acceleration refers to a reduction in speed, not necessarily at a uniform rate.
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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About Acceleration
Acceleration measures the rate at which velocity changes with time, including changes in speed, direction or both. Work includes average and instantaneous acceleration, the relation a = Δv/Δt, uniform acceleration equations, and interpreting velocity time and displacement time graphs, with acceleration carefully distinguished from velocity.
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