Lunar Lander: Land Softly Physics Game Community
Questions, answers and tips from people who use the Lunar Lander: Land Softly Physics Game. Fire the engine and tilt the lander to touch down softly on the pad, on the Moon, Mars or Earth..
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From the tool guide: common questions about Lunar Lander: Land Softly Physics Game
The items below are not posts by community members. They come from the written guide for this tool and are here to get a conversation started. Use “Ask a follow-up” to open a thread about any of them.
How do rockets land softly?
They fire the engine to slow the fall so the speed is small at touchdown, while keeping the rocket upright.
From the tool guide Ask a follow-upWhy is it harder on Earth?
Gravity is six times stronger than on the Moon, so more thrust and fuel are needed to cancel it.
From the tool guide Ask a follow-upKey ideas
- Gravity pulls the lander down at a steady rate, so its downward speed keeps growing.
- Engine thrust gives an upward acceleration that can slow the fall.
- Tilting the lander sends some of the thrust sideways.
- Weaker gravity, like on the Moon, makes soft landings easier and uses less fuel.
Things to try
- Land on the Moon with under 30 percent fuel used.
- Try Mars, then Earth, and raise the engine power to compensate.
- Land on the pad with less than 1 m/s falling speed.
- Try to land with zero sideways speed.
Where this is used
SpaceX booster landings, the Apollo Moon landings and Mars rovers all needed exactly this control of thrust, tilt and fuel.
How to ask a question people can answer
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