Question

4.
An aeroplane flies at constant speed in a horizontal straight path. Two horizontal forces act on the
plane. One is the thrust of the propellers that pushes it forward, and the other is the force of air
resistance that acts in the opposite direction. Which force is greater??

Answer 1

Answer:

force of propellers on plane

Explanation:

in theory both the particles of both the medium would exert equal and opposite force (newtons 3rd law). but in acc to force which pushes the plane forward is the force of propellers which stands to be greater

Answer 2

Answer:

The plane is moving at constant speed. From Newton's Ist law, the net external force on plane must be zero. The thrust produced by propeller and the air resistance are equal and are in opposite directions to produce zero net force.

Explanation:

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