Answer:
![a = 1.07 m/s^2](https://tex.z-dn.net/?f=a%20%3D%201.07%20m%2Fs%5E2)
Explanation:
As we know that the runner starts from rest position
So here we can say
![v_i = 0](https://tex.z-dn.net/?f=v_i%20%3D%200)
now the distance moved by the runner is given as
![d = 30 m](https://tex.z-dn.net/?f=d%20%3D%2030%20m)
also we know that final speed of the runner will be
![v_f = 8 m/s](https://tex.z-dn.net/?f=v_f%20%3D%208%20m%2Fs)
now we know that
![v_f^2 - v_i^2 = 2 a d](https://tex.z-dn.net/?f=v_f%5E2%20-%20v_i%5E2%20%3D%202%20a%20d)
![8^2 - 0 = 2(a)(30)](https://tex.z-dn.net/?f=8%5E2%20-%200%20%3D%202%28a%29%2830%29)
![a = \frac{64}{60}](https://tex.z-dn.net/?f=a%20%3D%20%5Cfrac%7B64%7D%7B60%7D)
![a = 1.07 m/s^2](https://tex.z-dn.net/?f=a%20%3D%201.07%20m%2Fs%5E2)
That thing is used as a lever.
kinematics can be defined as a sub-discipline in physics aimed at understanding the motion of objects without considering the forces that move them.
- Classical mechanics refers to a physical theory that describes the motion of objects.
- Kinematics can be considered a branch of classical mechanics that studies the motion of objects but without considering the forces that move them.
- Kinematics describes the motion of objects and systems by using different types of information such as diagrams, numbers, equations and/or graphs.
In conclusion, kinematics is a sub-discipline in physics aimed at understanding the motion of objects without considering the forces that move them.
Learn more about kinematics here:
brainly.com/question/24486060
Answer:
I uploaded the answer to a file hosting. Here's link:
Explanation:
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Electromagnetic waves can travel through a vacuum; mechanical waves require a medium.