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In the study of physics, what distinguishes a scalar from a vector?

In the study of physics, what distinguishes a scalar from a vector?A scalar is specified with a single number, but a vector is specified using both a magnitude and a direction. A scalar must always be positive, but vectors can be positive, negative, or zero. Nothing—the terms “vector” and “scalar” are different names for the same thing. Scalars have both a magnitude and a direction, but vectors have only a magnitude. A scalar is a dimensionless number, while vectors are numbers that have dimensions.
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Jayce Wintheiser

Feb 20, 2025

A vector has both a magnitude and direction. A scalar only has a magnitude.... Show More
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J
Jayce Wintheiser

Feb 20, 2025

Think of going north in a car at 100km/hour. Your speed is 100km/hr but velocity is 100km/hr at 0 deg. Where does degree come into this? Think of going south at same speed. Speed is same but velocity is -100km/hour. velocity tells you at what angle you are moving with reference to some thing. I have taken north as reference. I quote: "As a quick example, let's look at speed, which has dimensions of length divided by time or L/T. Its SI units are then metres divided by seconds, represented as m/s or m·s-1" This quote is fromhttps://www.physics.uoguelph.ca/tutorials/dimanaly... Who said a scalar is a dimensionless number?? Speed is not just 100 but 100km/hour... Show More
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J
Jayce Wintheiser

Feb 20, 2025

The first of the five statements is the best answer.... Show More
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