Answer :
the answers would be her speed is 4.4 m/s and her velocity is 0 m/s.
Answer: Her speed is 4.4 m/s, and her velocity is 0 m/s.
Step-by-step explanation:
Required formula :
[tex]\text{speed}=\dfrac{\text{distance}}{\text{time}}[/tex] (Scalar quantity)
[tex]\text{velocity}=\dfrac{\text{displacement}}{\text{time}}[/tex] (Vector quantity)
Given : The length of track = 400 meters
She has to complete four laps around the track.
Then , the total distance = [tex]4\times400 = 1600[/tex]
Time taken yo complete race = 6 minutes = [tex]6\times60 = 360\text{ seconds}[/tex]
[∵ 1 minute = 60 seconds.]
[tex]\Rightarrow \text{speed}=\dfrac{1600}{360}=4.44\text{ m/s}[/tex]
i.e. Her speed is 4.4 m/s.
Also, when she completes each lap , the starting point is equal to the terminal point , it means the displacement would be zero.
[tex]\Rightarrow\ \text{velocity}=\dfrac{0}{360}=0\ m/s[/tex]
Thus , her velocity is 0 m/s.
So the statement that best describes her speed and velocity : Her speed is 4.4 m/s, and her velocity is 0 m/s.