The lift experienced by a helicopter involves an action-reaction pair of forces between the
A)helicopter blades and the air.
B)mass of the helicopter and Earth's mass.
C)weight of the helicopter and atmospheric pressure.
D)motion of the helicopter relative to the ground below.
E)any or all of the above

Question

Quizplus · Accepted Answer

The lift experienced by a helicopter is generated by the action-reaction pair of forces between the helicopter blades and the air. As the blades rotate, they push air downwards, and by Newton's third law, the air exerts an equal and opposite force on the blades, lifting the helicopter. The other options, B, C, and D, are not related to the lift experienced by a helicopter. Option E is partially correct but does not identify the best choice.

The Lift Experienced by a Helicopter Involves an Action-Reaction Pair