Question
The Tethered Satellite discussed in this module is producing 5.00 kV, and a current of 10.0 A flows. (a) What magnetic drag force does this produce if the system is moving at 7.80 km/s? (b) How much kinetic energy is removed from the system in 1.00 h, neglecting any change in altitude or velocity during that time? (c) What is the change in velocity if the mass of the system is 100,000 kg? (d) Discuss the long term consequences (say, a week-long mission) on the space shuttle’s orbit, noting what effect a decrease in velocity has and assessing the magnitude of the effect.
1. $6.41 \textrm{ N}$
2. $1.80 \times 10^8 \textrm{ J}$
3. 0
4. Over a 1 week period the orbital radius will by 99% of it's initial distance. This is OK, but over a longer period a decreasing orbital radius would become an issue.
Solution Video