Question

Which statement best explains why a paper airplane eventually falls to the ground? (1 point)
• Inertia prevents new forces from acting on the airplane to keep it up.
• The unbalanced forces of air resistance and gravity slow the airplane and pull it down.
• The force from throwing the airplane loses strength as the airplane moves.
• Inertia slows the airplane and pulls it down.

Answer 1

"The unbalanced forces of air resistance and gravity slow the airplane and pull it down."

Explanation: Gravity constantly pulls the plane downward. Air resistance (and insufficient lift) reduces its forward/vertical support so the net (unbalanced) force is downward, causing it to fall.