While flying horizontally in an airplane, you notice that a string dangling from the overhead luggage compartment hangs at rest

Question

While flying horizontally in an airplane, you notice that a string dangling from the overhead luggage
compartment hangs at rest at 15° away from the vertical toward the front of the plane. Using this observation, you can conclude that the airplane is

accelerating forward. 
moving backward.
not accelerating because the string is at rest.
O moving forward.
accelerating backward.

Kunduz · Accepted Answer

Click to see the answer