Pendulum on Earth and another planet different periods radii

[James Ray]

Homework Statement

Homework Equations

The Attempt at a Solution

 

[James Ray]

Homework Statement

View attachment 100919

Homework Equations

The Attempt at a Solution

View attachment 100920

The radius seems very small (a factor of 10 less than Earth's radius. But I can't see any mistake in the solution.

 

[ehild]

Your result is wrong. You should use the template and type in your work.

 

[James Ray]

Your result is wrong. You should use the template and type in your work.

I forgot to square the radius in the first calculation.

 

[ehild]

Read this https://www.physicsforums.com/threads/guidelines-for-students-and-helpers.686781/ before your next posts.

 

[James Ray]

I forgot to square the radius in the first calculation.

Now I get 11200 km.

 

[ehild]

It is all right now, but how did you get it? I see quite a lot of unnecessary calculations on your sheet of paper. It would be very easy if you derived the formula for R2 symbolically.