Shown is a line drawing of how an airfoil redirects air as it moves. Lift refers to the force that an object needs to overcome its weight. If an aircraft is being pulled down toward the Earth by gravity and its own mass, how does it stay in the air? The answer is the second force, lift. Below the rear part of the aircraft is once again a red arrow pointing downward with the word "weight" beside it. The fighter jet appears to be flying almost straight up into the sky. Below the centre of the aircraft is a red arrow pointing downward beside the word "weight". The large twin-engined airliner, appears to be flying in a level position and travelling from left to right. Below the balloon is a red arrow pointing downward beside the word "weight", indicating that weight is a downward force, and the direction of the force is perpendicular to the ground. The green hot air balloon appears to be floating in a clear blue sky. Directional arrows and text are overlaid on the photo. Shown, from left to right, are photographs of a hot air balloon, a large commercial airliner and a fighter jet. This force, as mentioned above, also has a direction. Substituting W for F above we get: W = mgįrom this equation, we can see that when we talk about ‘weight’ we are actually talking about how much force is acting on a mass due to gravity. However, we usually use the symbol W when specifically talking about weight. In terms of the four forces acting upon an aircraft, weight is measured as the F in the above equation. When doing this calculation, it is best to use the unit for gravity in N/kg: g = 9.81 N/kg
Where F is the force in newtons newtons ( N), m is the mass of the object in kg and g is the acceleration due to gravity. In the case of the Earth, “toward itself” means “down toward the ground.” The force exerted on a body due to gravity can be expressed using the equation: F = mg Certain objects in space, including planets like the Earth, exert a force that attracts objects toward itself. The weight of an object is the force on the object due to gravity. The first of the four forces exerted on aircraft is weight. Each of these plays a key role in keeping an aircraft in the air and moving forward. These are weight, lift, thrust, and drag. There are four forces that act on things that fly. But have you ever wondered how an aircraft flies? The answer is easy - with a little physics! Flight is all about forces and movement, which can be explained using physics. You’ve probably seen an airplane flying at some point. Open Professional Learning × Close Professional Learning Open Educational Resources × Close Educational Resources
0 kommentar(er)
