Question

a swimmer is in a 20m Olympic size pool ; he swims one pool length in 4s. Let's assume he swam at a constant velocity 1. calculate the average velocity 2. determine the equation of motion for the swimmer

Answer 1

We know that

• The length of the pool is 20 meters.

,

• The time spent to swim the pool is 4 seconds.

,

• The motion is constant.

Given that there's a constant motion, we can use the equation d = v*t, where d = 20m, and t = 4sec. Let's find the constant velocity.

`\begin{gathered} d=vt \\ 20m=v\cdot4\sec \\ v=(20m)/(4\sec ) \\ v=5\cdot(m)/(s) \end{gathered}`

The constant velocity is 5 m/s.

On the other hand, the equation of motion would be d = v*t because the motion has a null acceleration.

The equation of motion is d = v*t.