Question

Lila is a track and field athlete. She must complete four laps around a circular track. The track itself measures 400 meters from start to finish and the race took her 6 minutes to complete. Which best describes her speed and velocity? (There are 60 seconds in 1 minute.)

Answer 1

for the lazy people the answer is A

Step-by-step explanation:

just finished the test and got it right

Answer 2

Answer: Her speed is 4.4 m/s, and her velocity is 0 m/s.

Step-by-step explanation:

Formulae :
`\text{Speed}=\frac{\text{Distance}}{\text{Time}}`

`\text{Velocity}=\frac{\text{Displacement}}{\text{Time}}`

Given: Length of track start to finish= 400 meters

After completing its 4 laps, total distance covered = 400 × 4 = 1600 meters

Time taken by Lila = 6 minutes

= 6 × 60 seconds [There are 60 seconds in 1 minute.]

= 360 seconds

Then,
`\text{Speed}=(1600)/(360)=(40)/(9)m/s`

`= 4.44\ m/s`

But from start to finish displacement = 0 m [displacement is the shortest distance between starting point to the finishing point]

So,
`\text{Velocity}=\frac0{360}=0\ m/s`

Hence, Her speed is 4.4 m/s, and her velocity is 0 m/s.