Answer:
We know that for a pendulum of length L, the period (time for a complete swing) is defined as:
T = 2*pi*√(L/g)
where:
pi = 3.14
L = length of the pendulum
g = gravitational acceleration = 9.8 m/s^2
Now, we can think on the swing as a pendulum, where the child is the mass of the pendulum.
Then the period is independent of:
The mass of the child
The initial angle
Where the restriction of not swing to high is because this model works for small angles, and when the swing is to high the problem becomes more complex.
The velocity is 4374.45 m/s.
I got the answer by using v=d/t.
20,000meters / 25min= 4,374.45 m/s.
Explanation:
25 ft I believe that this is the best answer
C. National Park Planning
Biodiversity - <span>the variety of life in the world or in a particular habitat or ecosystem.
Clear cutting and oil drilling both decrease the variety of life, destroying habitat around them.
Farming decreases biodiversity because it decrease the variety of flora in that area, depending on what crop is planted.</span>
B) Planck. He is not a developer of an atomic model.
