Answer: 5%.
- A 3%
- B 5%
- C 1%
- D 9%
Correct answer: B. 5%
Explanation: Since η = F/(6πrv), the relative errors in F, r, and v simply add: 2% + 1% + 2% = 5%.
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.