Try InSight on Mars (without explosion)


NASA just stopped InSight Lander on Mars. Yes, on Mars. This is a big deal, because the missions of Mars have not done so. It's no surprise, I'm super excited about missions on Mars.

For this specific mission, the airborne protected by the heat shield was used to slow down the atmosphere of Mars. After that, the speed parachute was determined to further reduce the speed. Eventually, the army from the parachute and the last part of the journey left for the purpose of control of its origin using missiles.

Now the real question, though: can you be responsible for InSight landing? What will happen if the robot gets saved? To understand.

Before the beginning of the game, go to the main physics. In order to keep it guided, I'm focusing on this rocket powered landing part of this mission. There are basically two forces at the time of cosmic origin. There is a gravitational force and surface strength from the spacecraft. The gravitational force simply depends on the local gravitational field and the mass of the massive mass. On Mars, this gravitational field is slightly lower on Earth, about 3.71 Newton's kilogram (compared to 9.8 N / kg on Earth). This gravitational field is essentially in constant power until you are on the surface of Mars.

Despite the fact that the gravitational field is permanent, it is not the mass of the massive mass. As he uses missiles, he has lost the mass (because the rocket engine works with fuel consumption). This means that the gravitational force also changes a bit, but of course the whole space fuels are not made. The overall mass of the fuel is only 16 percent of the total mass.

Massive changes in the spacecraft are influenced by its movement. According to the principle of impulsion, the total strength (gravitational plus rocket) is equal to the momentum of impulse change. However, momentum is defined as a mass and speed product. So the constant force in the cosmos means impulse that changes after constant change in the constant change. Yes, it gets tricky.

OK, let's jump into the game. Here's how it works.

  • The spacecraft is fully impregnated and 50 meters on the ground.
  • You'll get to change the rocket thrust.
  • Change in the speed of the rocket depends on what volume it causes.
  • The change in the fuel mass also depends on the number of missiles.
  • Would you like to miss the missile on a trip less than 1 m / s (it should be slower).

It is. Click "Run" to start and then change the slider to the bottom for a rocket thrust. The program also shows vertical speed and amount of fuel. This is a dimensional version of the classic video game Lunar Lander.

It seems more difficult. The problem is that we often think of the direct connection of the union and the motion that makes it more powerful to move faster. Look! Not so fast. In fact, the greater the force makes the change in motion. As the lander moves down, you have to increase the power to prevent it from accelerating as he comes. But if it gains a lot, landing is a lot of people that actually start in the opposite direction. This is not a landing that is off.

Now there is some homework. Have a look at the land (safe) in less time. Now we try to create an algorithm of a scale thrust (not user-controlled) which is the shortest time landing. Ე will be fun.


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