The weight of a helicopter and truck is calculated by multiplying the mass of each object by the acceleration due to gravity (9.8 m/s^2). The total weight is the sum of the individual weights.
The main forces involved in lifting a truck with a helicopter are lift, weight, thrust, and drag. Lift is produced by the helicopter's rotors and counteracts the weight of the truck. Thrust is generated by the helicopter's engine and is used to overcome drag, which is the resistance of the air.
The angle of the helicopter's rotors, also known as the blade pitch, can affect the lifting force by changing the angle at which the air flows over the rotor blades. A higher blade pitch can increase the lift force, while a lower blade pitch can decrease it.
The maximum weight a helicopter can lift is affected by several factors including the power and size of the engine, the design and weight of the helicopter, and the density of the air. Temperature, altitude, and wind conditions can also impact the maximum lifting capacity.
The shape and weight distribution of the truck can affect the helicopter's lifting ability by changing the center of gravity of the load. A heavier load towards the back of the truck can cause the helicopter to tilt backwards, making it more difficult to lift. The shape of the truck can also impact the amount of drag it creates, which can impact the amount of thrust needed from the helicopter to lift it.