Physics, 27.12.2019 20:31 addi92

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 minutes to complete.

which best describes her speed and velocity?

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

her speed is 1.1 m/s, and her velocity is 0 m/s.

her speed is 0 m/s, and her velocity is 2400 m/s.

her speed is 4.4 m/s, and her velocity is 4.4 m/s.

Answers: 3

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Answers

Speed = (total distance covered) / (time to cover the distance)

The question is not perfectly clear about the distance covered.
From the wording, we can't be sure whether the track is a 400-meter track, or whether her four laps total 400 meters.

If the track is a 400-meter track, then her 4 laps total 1600 meters.

   Speed = (1600 meters) / (360 seconds) = 4.44 meters/second

If her four laps total 400 meters, then

   Speed = (400 meters) / (360 seconds) = 1.11 meters/second.

Velocity = (distance between start-point and end-point) / (time) .

Lila did four complete laps, ending up at the place where she started.

   (distance between start-point and end-point) = 0

   Velocity = zero.

Answer from: keasiabrown25

The answer is a. Her speed is 4.4 m/s, and her velocity is 0 m/s.

Explanation:

I took the quiz

Answer from: Quest

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