dcardenas2005
19.01.2021 •
Physics
A 12.9 kg pelican, with a 1.51 kg fish in its mouth, is flying 14.94 m/s at a height of 114 m when the fish wiggles free and fall back toward the ocean. How fast is the fish moving when it hits the water
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Ответ:
v = 49.6 m/s
Explanation:
The vertical component of the final speed can be found by using 3rd equation of motion:
where,
g = acceleration due to gravity = 9.81 m/s²
h = height = 114 m
Voy = vetical component of initial velocity = 0 m/s (since the pelican is flying horizontally)
Vy = Vertical component of final velocity = ?
Therefore,
Now, the horizontal component of the velocity is assumed to be the same because of negligible frictional force. Therefore,
Vx = 14.94 m/s
Thus the final speed will be given as:
v = 49.6 m/s
Ответ: