A student is sitting in a chair and not moving, however, there are forces acting on her. What must be trust about the forces acting on the student?

I dont understand the qustion??

Explanation:

It is trusted that the sum of all forces acting on the student, adds up to zero the student is not moving.

Explanation: the plane they give you that the plane is moving at a constant velocity of 250 m/s this means that the acceleration is zero, we substituted in the formula F=ma which will give us the Force. And knowing that its constant speed, forward force is then equal to the Air resistance. Hence we find the Air resistance force

truck y has a greater velocity than truck x.