A bird flies 10ms for 3s, 15ms for 3s and 20ms for 4s.calculate the bird's average speed
To calculate the average speed of the bird, we need to find the total distance traveled and divide it by the total time taken.
For the first period of 3 seconds, the bird flies at a speed of 10 m/s. So, the distance covered in this period is:
Distance = Speed x Time = 10 m/s x 3 s = 30 meters
For the second period of 3 seconds, the bird flies at a speed of 15 m/s. So, the distance covered in this period is:
Distance = Speed x Time = 15 m/s x 3 s = 45 meters
For the third period of 4 seconds, the bird flies at a speed of 20 m/s. So, the distance covered in this period is:
Distance = Speed x Time = 20 m/s x 4 s = 80 meters
Now, we can find the total distance by adding the distances of each period:
Total Distance = 30 meters + 45 meters + 80 meters = 155 meters
The total time taken is the sum of the individual times:
Total Time = 3 seconds + 3 seconds + 4 seconds = 10 seconds
Finally, we can find the average speed using the formula:
Average Speed = Total Distance / Total Time = 155 meters / 10 seconds = 15.5 m/s
Therefore, the bird's average speed is 15.5 m/s.