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Zorluk: KolayNewton's Third Law (Action/Reaction)

According to the principle of action and reaction, interacting objects apply forces to one another. Pair the following initial mechanical forces with their direct reaction forces.

  • A jet engine forces hot exhaust gases backward out of its nozzle.The exhaust gases exert a forward thrust on the jet engine.
  • A swimmer's feet push forcefully backward against the concrete pool wall.The concrete pool wall exerts a forward thrust on the swimmer's feet.
  • The spinning blades of a helicopter push a large volume of air downward.The air exerts an upward lift force on the helicopter blades.
  • A high-pressure fire hose accelerates water forward out of its nozzle.The water exerts a backward recoil force on the fire hose.

Cevap

The correct pairings directly flip the interacting objects and reverse the direction of the force. The jet engine pushing gas backward matches with gas pushing the engine forward. The swimmer pushing the wall backward matches with the wall pushing the swimmer forward. The blades pushing air downward matches with air pushing the blades upward. The hose pushing water forward matches with water pushing the hose backward.
Each correct match demonstrates Newton's Third Law by identifying the exact same two interacting bodies from the action statement, reversing their roles as the object applying the force and the object receiving the force, and reversing the physical direction of that force.

Adım Adım Çözüm

1
Identify the two interacting objects in each initial force description.
In the jet engine scenario, the objects are the engine and the exhaust gases. In the swimmer scenario, they are the feet and the wall. In the helicopter scenario, they are the blades and the air. In the fire hose scenario, they are the hose and the water.
Newton's Third Law always involves two distinct objects interacting with one another.
2
Identify the physical direction of the applied initial force.
The initial forces are directed backward (gas), backward (wall), downward (air), and forward (water).
Reaction forces act in the exact opposite direction of the initial action force.
3
Formulate the reaction force by swapping the objects and reversing the direction.
The correct reactions are: gas pushing engine forward, wall pushing feet forward, air pushing blades upward, and water pushing hose backward.
If the first object exerts a force on the second object, the second object must exert an equal and opposite force on the first object.

Anahtar Kavram

For every action force, there is a simultaneous reaction force that is equal in magnitude, opposite in direction, and acts on a different object.
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Newton's Third Law (Action/Reaction)

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