Question

Harish ran a certain distance faster than Suresh. Which fundamental physical quantity/quantities is/are measured for comparing their speeds?

• A. only length
• B. only time
• C. both length and time
• D. speed

Answer 1

The correct option is B

only time

For the same distance, Harish ran faster than Suresh. Physical quantities that do not depend on, or are not derived from other physical quantity is called fundamental physical quantity. The fundamental physical quantity which is used to compare their speeds is time, as the distance traveled by both, is the same. Speed is not a fundamental physical quantity.