The first leg of a relay race is semi circle of diameter 50m. If the runner covers the distance in 11s.calculate the average speed�
d = pi*D/2 = 3.14 * 50/2 = 78.53 m.
d = V*t.
V = d/t = 78.53/11 =
To calculate the average speed, you need to divide the total distance covered by the total time taken.
Given:
- Radius of the semi-circle: half of the diameter = 50m / 2 = 25m
- Time taken: 11 seconds
To find the total distance covered, you need to calculate the circumference of the semi-circle. The formula for the circumference of a circle is C = 2πr, where "C" is the circumference and "r" is the radius.
C = 2π * 25
C ≈ 50π
Since a semi-circle is half of a circle, the total distance covered is half the circumference of the semi-circle.
Total distance = 1/2 * 50π
Total distance ≈ 25π
Now, to calculate the average speed, divide the total distance by the total time taken.
Average speed = Total distance / Total time
Average speed ≈ (25π) / 11
Average speed ≈ 2.27 m/s (rounded to two decimal places)
Therefore, the average speed of the runner is approximately 2.27 m/s.
To calculate the average speed, we need to divide the total distance covered by the total time taken.
In this case, the distance covered by the runner in the first leg of the relay race is the circumference of the semicircle, which is half the circumference of a full circle.
The formula for the circumference of a circle is C = πd, where C represents the circumference and d represents the diameter.
Given that the diameter of the semicircle is 50m, we can calculate the circumference:
C = πd
C = π * 50m
C ≈ 3.14 * 50m
C ≈ 157m
So, the total distance covered by the runner in the first leg of the race is approximately 157 meters.
Now, we can calculate the average speed by dividing the total distance by the time taken:
Average speed = Total distance / Total time
Given that the time taken is 11 seconds, we have:
Average speed = 157m / 11s
Calculating this division, we find that the average speed is approximately 14.27 m/s.