Question

Lebron bikes 800\,\text m800m800, start text, m, end text to the left in 25\,\text s25s25, start text, s, end text. What was his average velocity in \dfrac{\text m}{\text s} s m ​ start fraction, start text, m, end text, divided by, start text, s, end text, end fraction? Answer using a coordinate system where rightward is positive. Round the answer to two significant digits.

Answer 1

-32 m/s

Explanation:

Lebron bikes 800 m to the left in 25 seconds.

We are using a coordinate system where rightward is positive.

This means he is moving in the negative axis.

Hence, his displacement is actually -800m.

Velocity is the displacement moved by an object divided by the time spent i.e.

v = d / t

His velocity is therefore:

v = -800 / 25 = -32 m/s

His velocity is -32 m/s.