Hi ppl. I have a short question. A meteorite of mass m has a velocity u=2.00*10^4 m/s when it is at an infinite distance from the earth. It eventually collides with the eath with a velocity v. Calculate v. given are the radius of earth(6.37*10^6m) and go=9.80Nkg^-1)(adsbygoogle = window.adsbygoogle || []).push({});

I used the argument that the change in kinetic energy is going to be equal to 0.5m(v^2-u^2) which also equals GMem/2Re which resolves to goRem/2. Equating and calculating gives 2.15*10^4m/s. Could someone verify that this is correct and that potential energy or total energy is not neglected in my reasoning? thanks, joe

**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: Meteorite heading towards earth

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