Which of the following is a derived quantity:
Correct answer: D. Velocity
- A. Mass
- B. Length
- C. Time
- D. Velocity
Explanation
Velocity is a derived quantity. It is defined as the rate of change of displacement with respect to time. Mathematically, velocity (v) is given by the formula v= Δx/Δt, where Δx is the change in displacement, and Δt is the change in time. Velocity is derived from base quantities like length and time.
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About Measurements
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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