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Physics 7 Online
OpenStudy (anonymous):

How can Newton's second and third law both be true at the same time for a falling object? Explain.

OpenStudy (anonymous):

another question: Explain how if an object has a constant speed, how is its accelaration still at zero?

OpenStudy (anonymous):

1. Can you tell me which laws and interpret what you they mean. 2. Acceleration is change in velocity.

OpenStudy (anonymous):

second and 3rd laws

OpenStudy (anonymous):

Second law -> F=ma Third law F = - F What can we make of this?

OpenStudy (anonymous):

second Law: An objects acceleration if dependent on 2 variables, its mass and net force Third Law: For every action there is an opposite reaction

OpenStudy (anonymous):

because acceleration is the rate of change of velocity/speed. So if speed is constant, then acceleration=0.

OpenStudy (anonymous):

How can Newton's law both be true at the same time for a falling object? Explain.

OpenStudy (anonymous):

Well I answered 2 already above, and for if you have a falling object |dw:1423092112418:dw| F = ma, and the third law is being incorporated, Drag = - Weight

OpenStudy (anonymous):

I believe that what is desired is that while the earth through the gravitational force is causing the object to "fall" the object itself is producing a force on the earth (albeit essentially zero), the reaction to the force of the earth on the falling object. So for every action ( force of the earth on an object) there is an equal and opposite reaction ( force of the object on the earth)

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