Attractive force between Venus and Sun

  • Thread starter Thread starter sadifermi
  • Start date Start date
  • Tags Tags
    Force Sun Venus
AI Thread Summary
The discussion centers on calculating the gravitational force between Venus and the Sun using the formula F = Gm1m2/d^2. The calculated force is approximately 5.4687 x 10^22, but participants note that it should be rounded to three significant figures, resulting in 5.47 x 10^22 N. There is also mention of discrepancies with values from WolframAlpha, which uses slightly different mass figures for Venus and the Sun, yielding a force of 5.54 x 10^22 N. Additionally, the importance of including units in the final answer is emphasized. Accurate rounding and unit inclusion are critical for clarity in scientific calculations.
sadifermi
Messages
5
Reaction score
0
I just need someone to double check my answer and confirm they get the same answer as I do. Thanks.
Question: Find the attractive force between Vneus and the sun. The distance between their centers is 1.08x10^11.

Equation: F = Gm1m2/d^2
G= 6.67x10^-11 N.m^2/kg^2
m1 (mass of sun)= (1.98x10^30kg)
m2 (mass of venus) = (4.83x10^24kg)
d= (1.08x10^11)

= (6.67x10^-11 N.m^2/kg^2)(1.98x10^30kg)(4.83x10^24kg)/(1.08x10^11)^2
=5.4687 x 10^22

Please let me know if this is the correct answer asap. Thanks!
 
Physics news on Phys.org
Your answer has no units.
 
sadifermi said:
I just need someone to double check my answer and confirm they get the same answer as I do. Thanks.
Question: Find the attractive force between Vneus and the sun. The distance between their centers is 1.08x10^11.

Equation: F = Gm1m2/d^2
G= 6.67x10^-11 N.m^2/kg^2
m1 (mass of sun)= (1.98x10^30kg)
m2 (mass of venus) = (4.83x10^24kg)
d= (1.08x10^11)

= (6.67x10^-11 N.m^2/kg^2)(1.98x10^30kg)(4.83x10^24kg)/(1.08x10^11)^2
=5.4687 x 10^22

Please let me know if this is the correct answer asap. Thanks!

You have just omitted the next digits rather than round off to the 5 figures you have chosen to specify.

besides, your answer should only be to 3 figures!

And as per the previous post - you need some units.
 
Thanks folks, appreciate it!
 
WolframAlpha gets a slightly different result: 5.54*10^22 N

It uses a mass of venus which is larger by 1% and a mass of sun which is larger by .5%.
 
sadifermi said:
Thanks folks, appreciate it!

So you should have been saying 5.47 (correctly rounded) not 5.46 (merely truncated)
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top