Question

what is the science behind the helicopter which is flying in mars​

Answer 1

Explanation:

The blades, or “rotors” of a helicopter must spin fast enough to generate a force called “lift”. But lift can only be generated in the presence of some kind of atmosphere. While Mars does have an atmosphere, it's much, much thinner than Earth's — about 100 times thinner, in fact

Answer 2

Answer:

Explanation:

There are several technological challenges to conducting a helicopter flight on another world. First, and most significantly, helicopters need an atmosphere to fly.

Flying Ingenuity in Mars’s atmosphere is therefore the equivalent of flying a helicopter on Earth at a height of 100,000 feet. For reference, commercial aircraft fly between 30,000-40,000 feet above the Earth’s surface and the highest we’ve ever been in a helicopter on Earth is 42,000 feet.

Testing the craft on Earth required a pressurised room, from which a lot of air would have been extracted to emulate Mars’s atmosphere.

Then there’s the Martian gravity to consider, which is about one-third the strength of gravity on Earth. This actually gives us a slight advantage. If Mars had the same atmosphere as Earth, it’s lesser gravity means we’d be able to lift Ingenuity with less power than would be required here.

But while Mars’s gravity works to our advantage, this is offset by the lack of atmosphere.

Ingenuity’s success marks the first time such a flight has even been attempted outside of Earth. And the reason for this may simply be that, as laid out above, this task is very, very difficult.