what is the total displacement of a runner which finish the 1-km race in just 10 seconds
Assuming constant direction, 1 km
Actually, it is the distance from the start to finish. Doesn't matter how the runner got there. Not enough info to answer this.
To calculate the total displacement of a runner in a 1-kilometer race, we need to know the runner's average speed. From there, we can multiply the average speed by the time taken to complete the race.
In this case, the runner finished the 1-kilometer race in 10 seconds. To find the average speed, we need to convert this time into a speed unit such as meters per second.
1 kilometer is equal to 1000 meters, and since the time taken is 10 seconds, we divide 1000 meters by 10 seconds to get the runner's average speed.
Average Speed = Distance / Time
Average Speed = 1000 meters / 10 seconds
Average Speed = 100 meters per second
Now that we have the average speed, we can calculate the total displacement by multiplying the average speed by the time taken.
Total Displacement = Average Speed * Time Taken
Total Displacement = 100 meters per second * 10 seconds
Total Displacement = 1000 meters
Therefore, the total displacement of the runner who finishes the 1-kilometer race in 10 seconds is 1000 meters.