A bird flies 10ms for 3s, 15ms for 3s and 20ms for 4s.calculate the bird's average speed

Answer 1

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.