Answer:
Explanation:
kenetic is made for thermal things
Answer:
The best estimate of the depth of the well is 2.3 sec.
Explanation:
Given that,
Record time,
![t_{1}=2.19\ sec](https://tex.z-dn.net/?f=t_%7B1%7D%3D2.19%5C%20sec)
![t_{2}=2.30\ sec](https://tex.z-dn.net/?f=t_%7B2%7D%3D2.30%5C%20sec)
![t_{3}=2.26\ sec](https://tex.z-dn.net/?f=t_%7B3%7D%3D2.26%5C%20sec)
![t_{4}=2.29\ sec](https://tex.z-dn.net/?f=t_%7B4%7D%3D2.29%5C%20sec)
![t_{5}=2.27\ sec](https://tex.z-dn.net/?f=t_%7B5%7D%3D2.27%5C%20sec)
We need to find the best estimate of the depth of the well
According to record time,
We can write of the record time
![t_{1}=2.19\approx 2.2\ sec](https://tex.z-dn.net/?f=t_%7B1%7D%3D2.19%5Capprox%202.2%5C%20sec)
![t_{2}=2.30\approx 2.3\ sec](https://tex.z-dn.net/?f=t_%7B2%7D%3D2.30%5Capprox%202.3%5C%20sec)
![t_{3}=2.26\approx 2.3\ sec](https://tex.z-dn.net/?f=t_%7B3%7D%3D2.26%5Capprox%202.3%5C%20sec)
![t_{4}=2.29\approx 2.3\ sec](https://tex.z-dn.net/?f=t_%7B4%7D%3D2.29%5Capprox%202.3%5C%20sec)
![t_{5}=2.27\approx 2.3\ sec](https://tex.z-dn.net/?f=t_%7B5%7D%3D2.27%5Capprox%202.3%5C%20sec)
Here, all time is nearest 2.3 sec.
So, we can say that the best estimate of the depth of the well is 2.3 sec.
Hence, The best estimate of the depth of the well is 2.3 sec.
Answer:
Explanation:
Given
height of grand canyon is ![h=1800\ m](https://tex.z-dn.net/?f=h%3D1800%5C%20m)
Rock is dropped i.e. initial velocity is zero
![u=0](https://tex.z-dn.net/?f=u%3D0)
Using Equation of motion
![h=ut+\frac{1}{2}at^2](https://tex.z-dn.net/?f=h%3Dut%2B%5Cfrac%7B1%7D%7B2%7Dat%5E2)
h=height
u=initial velocity
a=acceleration
t=time
here a=acceleration due to gravity
![1800=0+\frac{1}{2}\times 9.8\times t^2](https://tex.z-dn.net/?f=1800%3D0%2B%5Cfrac%7B1%7D%7B2%7D%5Ctimes%209.8%5Ctimes%20t%5E2)
![t^2=\frac{2\times 1800}{9.8}](https://tex.z-dn.net/?f=t%5E2%3D%5Cfrac%7B2%5Ctimes%201800%7D%7B9.8%7D)