Answer: (gR).
- A √(g/R)
- B gR
- C √(gR)
- D g√R
Correct answer: C. √(gR)
Explanation: Setting [L T<sup>-1</sup>] = [L T<sup>-2</sup>]<sup>a</sup>[L]<sup>b</sup> gives a = 1/2, b = 1/2, so v is proportional to √(gR).
The 7 SI base units. All derived units (newton, joule, watt, volt, etc.) can be expressed as combinations of these 7 fundamental units raised to various powers.
Concept context
SI base units, dimensional analysis, significant figures, and error propagation. The toolkit every physics calculation relies on.