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Iteru [2.4K]
3 years ago
13

Lila is a track and field athlete. She has to complete four laps around the track, which is 400 meters. The race took her 6 minu

tes to complete.
Which best describes her speed and velocity?

A)Her speed is 4.4 m/s, and her velocity is 0 m/s.
B)Her speed is 0 m/s, and her velocity is 2400 m/s.
C)Her speed is 4.4 m/s, and her velocity is 4.4 m/s.
Mathematics
2 answers:
sleet_krkn [62]3 years ago
4 0

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

Step-by-step explanation:

The formula to calculate the speed is given by :-

\text{Speed}=\dfrac{\text{Distance}}{\text{Time}}

Given: The length of the track = 400 meters

Time taken to complete 4 laps = 6 minutes =

The total distance covered in 4 laps = 4\times400=1600\text{ meters}

Now, her speed is given by :-

\text{Speed}=\dfrac{1600}{6\times60}}\approx4.44\text{ m/s}

Since the starting point and the ending point is same , then the her displacement is zero.

Hence,  velocity =0

nlexa [21]3 years ago
3 0
The answer is A. 
Speed = distance / time
Speed = (4*400) / (6*60)    (6*60 to turn minutes to seconds)
Speed = 1600 / 360
Speed = 4.44

Velocity = displacement / time
since she is running in a circle, she stops where she started making he displacement 0
Velocity = 0 / 6*60
Velocity = 0


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