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

please look at the following statements:

1: due to air resistance, total energy of a satelliit will decrease gradually, dissipated into internal energy.

As T.E. = -GMm/2r, r will decrease, hence K.E. increases (K.E.=GMm/2r), implies speed increses.

(T.E.=PE+KE)

2: 98 01A 1 (c)(ii) E=T.E.

http://m1.freeshare.us/128fs1722277.png

http://m1.freeshare.us/128fs1722344.png

2. Relevant equations

T.E.=PE+KE

3. The attempt at a solution

in 2, if speed decreases, hence KE (=1/2 mv^2) decrease, as K.E.=GMm/2r, then r should be increased instead of decrease, so any contradiction?

**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!

# G-field - help very confused

Can you offer guidance or do you also need help?

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