11 авг. 2016 г. · An object needn't be moving when there is no net force. For example, merely by standing on the ground, there is no net force in the vertical ...

25 апр. 2020 г. · Why is kinetic energy stored as potential energy in a body during its motion against gravity? Every physicist is eventually confounded by the ...

18 окт. 2023 г. · That is a LANDED helicopter. Flying helicopters are in the air, moving, and their rotors ARE turning.

11 нояб. 2021 г. · It depends on where the hover is occurring. There are two types of hover: IGE (In Ground Effect) and OGE (Outside Ground Effect).

12 мар. 2019 г. · You get it by conservation of momentum. A force is a rate of change of momentum, and a helicopter hovers by accelerating air downwards.

18 мая 2023 г. · They can hover for some time (as long as the fuel holds out), but they need to move a bit when hovering at very low altitude because of ground ...

30 янв. 2023 г. · Helicopters burn fuel at a tremendous rate, especially when they are hovering, so after a short time hovering they are going to have to go ...

22 мая 2022 г. · Hovering do use more energy because you're directly fighting the force of gravity. You need an engine that can generate more thrust than your airplane weighs.

23 нояб. 2021 г. · When the helicopter lifts off into a hover, it does not lose that kinetic energy. It is still moving at about the same speed as the ground ...

20 мая 2021 г. · A helicopter can stay motionless in the air because it has a rotor system that generates lift and thrust in any direction.