A 4kg eagle picks up a 75g snake and raises it 2.5 m from the ground to a branch. What is the work done to raise the bird's own centre of mass to the branch? (Assume g=10m/s^2)
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Given info : A 4 kg eagle picks up a 75 g snake and raise it 2.5 m from the ground a branch.
To find : the work done to raise the bird's won centre of mass to the branch is..
solution : work done by the eagle to pick up the snake to the branch = change in potential energy of the bird.
= mgh₂ - mgh₁
h₁ = height of eagle when it picks up the snake = 0
h₂ = height of eagle when it reaches to the branch = 2.5 m
m = mass of bird = 4 kg
g = acceleration due to gravity = 10 m/s²
∴ work done = 4 kg × 10 m/s² × 2.5 m
= 100 Joules.
therefore the work done to raise the brid's won centre of mass to the branch is 100 J.
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Answer:
30
Explanation:
w=fscos teta
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