Question

Hey swimmer swim 50 m in 20 seconds what is their average velocity

Answer 1

Average Velocity = displacement / time

= 50 / 20

= 2.5 m/s

Displacement is the length from Start Point to End Point

Example

John drives from his house to North 3 m then he drives to the East 4 m

You can find displacement by the Pythagorean Theorem.

Displacement =
`\sqrt[]{3^(2) +4^(2) }` = 5 m

Pythagorean Theorem

(From Wikipedia)

...This theorem can be written as an equation relating the lengths of the sides a, b and c, often called the "Pythagorean equation"

`a^(2) +b^(2) = c^(2)`

where c represents the length of the hypotenuse and a and b the lengths of the triangle's other two sides. The theorem, whose history is the subject of much debate, is named for the ancient Greek thinker Pythagoras.

Answer 2

It’s 2.6 for the average velocity