(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Consider the extreme case that the comet is released from rest at a distance R_max from the sun. In this case L is actually zero. Use the technique described in connection with 4.58 to find how long the comet takes to reach the sun. The radius of the sun for now is zero.

2. Relevant equations

Equation 4.58 is T=∫dr/(E-U(r))^(1/2)

E should be -GM_sM_c/R_max

and U(r) should be -GM_sM_c/r

3. The attempt at a solution

So I intergrate this and my bound are 0 to R_max. I just want to know if I'm on the right track becasue the integral is very messy. Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Calculating how long it takes for a comet to reach a sun of radius zero

Tags:

**Physics Forums | Science Articles, Homework Help, Discussion**