Answer:
Distance and displacement are the same in the 100-m sprint, therefore, velocity and speed are the same in the 100-m sprint.
Distance is 400 meters in the 400-m sprint, therefore Speed is not zero in the 400 M sprint.
Displacement is zero in the 400-m sprint, therefore, Velocity is zero in the 400-m sprint
<em>Note: The question is missing some details which is given below;</em>
<em>A 100-meter sprint is a race using only the straight side of a racetrack. a 400-meter sprint is a race that makes one complete lap around a racetrack. why are velocity and speed the same for a 100-m sprint but not a 400-m sprint?</em>
Explanation:
The speed of a body is the ratio of the distance covered and the time taken whereas the velocity of a body is the rate of change of displacement with time.
Distance measures the total length of space covered throughout the duration of motion, whereas displacement measures the change in a specified direction from a specific point.
In the 100 m race along a straight line, both distance and displacement = 100 m, therefore speed and velocity are the same. However, in the 400 m race, distance covered is 400 m, but the displacement is zero since the person returns to his/her starting point. Therefore, speed is not equal to zero, but velocity is equal to zero.
