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where is the gravitational force directed as you stand on the floor? ​

Sagot :

Where is the gravitational force directed as you stand on the floor?  

Newton's laws of motion are three rules that define the relationship between an object's motion and the forces that operate on it. The first law specifies that unless acted upon by an external force, an object either stays at rest or moves at a steady velocity. The second law states that the rate of change of momentum of an object is directly proportional to the force applied, or that the net force on an object is equal to the mass of that object multiplied by the acceleration on an object of constant mass. The third law states that when one object exerts a force on another, the second object exerts a force on the first object that is equal in magnitude and opposite in direction.

  • You're definitely aware that the Earth is pulling down on you. You may be oblivious that you are still pulling up on the Earth. For eg, if the Earth exerts a gravitational force of 500 N on you, you exert a gravitational force of 500 N on the Earth as well. This amazing reality is a product of Newton's third law.

  • A force is a push or pull that an object experiences as a result of its contact with another object. Interactions produce powers! As discussed in Lesson 2, certain forces are the product of touch interactions (for example, natural, frictional, tensional, and applied forces) and others are the result of action-at-a-distance interactions (gravitational, electrical, and magnetic forces). As objects A and B communicate with each other, they exert forces on each other, according to Newton. When you sit in your chair, your body exerts a downward force on it, while the chair exerts an upward force on you. This impact produces two forces: a force on the chair and a force on the body. Newton's third rule of motion deals with these two forces, which are known as action and reaction forces. Newton's third rule is formalized as follows:  

For every action, there is an equal and opposite reaction.

  • The statement implies that in any interaction, two forces act on the two interacting objects. The magnitude of the forces acting on the first object equals the magnitude of the forces acting on the second object. The force on the first object is directed in the same direction as the force on the second object. Forces are often used in groups, with equivalent and opposite action-reaction force pairs.

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