Answer:
Acceleration due to gravity will be ![g=5.718m/sec^2](https://tex.z-dn.net/?f=g%3D5.718m%2Fsec%5E2)
Explanation:
We have given length of pendulum l = 55 cm = 0.55 m
It is given that pendulum completed 100 swings in 145 sec
So time taken by pendulum for 1 swing ![=\frac{145}{100}=1.45sec](https://tex.z-dn.net/?f=%3D%5Cfrac%7B145%7D%7B100%7D%3D1.45sec)
We have to find the acceleration due to gravity at that point
We know that time period of pendulum;um is given by
![T=2\pi \sqrt{\frac{l}{g}}](https://tex.z-dn.net/?f=T%3D2%5Cpi%20%5Csqrt%7B%5Cfrac%7Bl%7D%7Bg%7D%7D)
So ![1.45=2\times 3.14\times \sqrt{\frac{0.55}{g}}](https://tex.z-dn.net/?f=1.45%3D2%5Ctimes%203.14%5Ctimes%20%5Csqrt%7B%5Cfrac%7B0.55%7D%7Bg%7D%7D)
![\sqrt{\frac{0.55}{g}}=0.230](https://tex.z-dn.net/?f=%5Csqrt%7B%5Cfrac%7B0.55%7D%7Bg%7D%7D%3D0.230)
Squaring both side
![{\frac{0.3025}{g}}=0.0529](https://tex.z-dn.net/?f=%7B%5Cfrac%7B0.3025%7D%7Bg%7D%7D%3D0.0529)
![g=5.718m/sec^2](https://tex.z-dn.net/?f=g%3D5.718m%2Fsec%5E2)
So acceleration due to gravity will be ![g=5.718m/sec^2](https://tex.z-dn.net/?f=g%3D5.718m%2Fsec%5E2)
Answer:
B. About 12 degrees
Explanation:
The orbital period is calculated using the following expression:
T = 2π*(
)
Where r is the distance of the planet to the sun, G is the gravitational constant and m is the mass of the sun.
Now, we don't actually need to solve the values of the constants, since we now that the distance from the sun to Saturn is 10 times the distance from the sun to the earth. We now this because 1 AU is the distance from the earth to the sun.
Now, we divide the expression used to calculate the orbital period of Saturn by the expression used to calculate the orbital period of the earth. Notice that the constants will cancel and we will get the rate of orbital periods in terms of the distances to the sun:
= ![\sqrt{\frac{rSaturn^3}{rEarth^3} } = \sqrt{10^3}}](https://tex.z-dn.net/?f=%5Csqrt%7B%5Cfrac%7BrSaturn%5E3%7D%7BrEarth%5E3%7D%20%7D%20%3D%20%5Csqrt%7B10%5E3%7D%7D)
Knowing that the orbital period of the earth is 1 year, the orbital period of Saturn will be
years, or 31.62 years.
We find the amount of degrees it moves in 1 year:
![1year * \frac{360degrees}{31.62years} = 11.38 degrees](https://tex.z-dn.net/?f=1year%20%2A%20%5Cfrac%7B360degrees%7D%7B31.62years%7D%20%3D%2011.38%20degrees)
or about 12 degrees.
Using the constant acceleration formula v^2 = u^2 + 2as, we can figure out that it would take a distance of 193.21m to reach 27.8m/s
Hy tikki! I've asked some questions, so of you find the questions as easy, then answer it. I'll surely mark you as brainliest :)