Question

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

• A. Both length and time
• B. Only length.
• C. Speed
• D. Only time

Answer 1

The correct option is D

Only time

For the same distance, Harish ran faster than Suresh. Physical quantities that do not depend/derived on/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.