A bird flew16 km west in 5 hours, then flew 20 km east in 6 hours. What was the bird’s velocity?
Disp. = -16 + 20 = 4 km.
V = 4km/(5+6)hrs. = 0.364 km/hr., East.
To calculate the bird's velocity, we need to find the bird's total displacement and divide it by the total time taken.
The bird first flew 16 km west in 5 hours, so its displacement is -16 km (negative because it flew west).
The bird then flew 20 km east in 6 hours, so its displacement is +20 km (positive because it flew east).
To find the bird's total displacement, we can add these two displacements:
Total Displacement = -16 km + 20 km = 4 km (note that the negative sign can be ignored, as it represents direction)
Now, to find the bird's velocity, we divide the total displacement by the total time taken:
Total Time = 5 hours + 6 hours = 11 hours
Velocity = Total Displacement / Total Time
Velocity = 4 km / 11 hours
Thus, the bird's velocity is approximately 0.364 km/h (rounded to three decimal places).