Radial Acceleration of Point on Planet: Calculate Using v^2/r

[portillj72]

Consider a planet of radius 5.53X10^6 m with a rotation period of 24.3 hours. Compute the radial acceleration of a point on the surface of the planet at the equator due to its rotation about its axis.

What is the Radial Acceleration.

I found out that the formula for radial acceleration is v^2/r but I don't know how to make the problem fit into it!

 

[Dick]

How do you find v? How far does a point on the equator travel in 24.3 hours? v=distance/time.

 

[portillj72]

i don't get the distance. the only distance i get is the radius.

 

[Dick]

A point on the equator rotates around the planet once in 24.3 hours. What's the circumference of the planet? It is related to r.

 

[portillj72]

ooo so then v = 2pi(r)/t
and then I can plug it in the original formula for the radial acceleration right?

 

[portillj72]

thank you so much I got it!