What is the meaning of subscript i in vi and subscript f in vf?

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Question: What is the meaning of subscript i in v_i and subscript f in v_f?

Option a: The subscript i means in, f means force. This is incorrect because i and f are not standard abbreviations for 'in' and 'force' in physics notation. Subscripts are typically used to denote initial and final states, not directions or forces.

Option b: The subscript i means initial, f means final. This is the conventional usage in physics and kinematics: v_i is the velocity at the initial time, and v_f is the velocity at the final time. It correctly identifies the purpose of the subscripts as markers of time or stage in a process.

Option c: The subscript i means inter, f means fall. This is not a recognized or meaningful interpretation in physics notation. The letters do not correspond to standard terms, and the suggestion of 'inter' or 'fall' is misleading.

Option d: The subscript i means into, f means fill. These meanings do not align with common physics or math convention. Subscripts like i and f are not used to denote actions like 'into' or 'fill' in the context of velocity or state variables.

In summary, option b correctly identifies the conventional interpretation of i and f subscripts as initial and final, while the other options assign incorrect or nonstandard meanings to these subscripts.

UCIC 202503 PHYS101 Quiz 1

What is the meaning of subscript i in vi and subscript f in vf?

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