Answer:
![W=6435N](https://img.qammunity.org/2020/formulas/physics/high-school/7vahc13t0hvnr3pg8x6spc196sija697vn.png)
Step-by-step explanation:
From the exercise we know that the force on the plane is 7934N upward at an angle of 54.2º.
If analyze the forces in the vertical direction, the acceleration is zero because the plane is moving with constant velocity
∑
![F_(y)=7934sin(54.2)-W=0](https://img.qammunity.org/2020/formulas/physics/high-school/oq7wjzy3vn2gutr0zwkx0l06isicizmcd9.png)
![W=7934sin(54.2)N=6435N](https://img.qammunity.org/2020/formulas/physics/high-school/dfwvh89d3hjdfx7h79ugssks7td5mccljt.png)
So, the weight of the plane is 6435N