Hello I need osme help with these two problems. I was told the ansers but do not undersatnd how the answers were gotten.(adsbygoogle = window.adsbygoogle || []).push({});

1. The power dissipated in lifting a 2.0 kg ball vertically at 3.0m/s equals what?

The answer is 59 W. ALl I know is that power equals Work/ delta T but there is no time for this one.

2. Increasing the orbital radius of a satellite by a factor of 2 requires its period to change by a factor of what?

For thi I know R^3/T2=R^4/T^2.

I would appreciate any help.

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

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

# Power and Satellites

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