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2006-09-11 00:00:45 · 5 answers · asked by Anonymous in Science & Mathematics Physics

5 answers

Newton's First Law :
An object at rest stays at rest and an object in motion stays in motion with the same velocity unless acted upon by an external force.

Newton's Second Law :
When a resultant external force acts on a body the rate of change of the body's momentum is proportional to the force and takes place in the direction of the force.

F=MA

Newton's Third Law :
For every action, there is an equal and opposite reaction.

2006-09-11 00:32:21 · answer #1 · answered by Brenmore 5 · 0 0

Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. The key point here is that if there is no net force acting on an object (if all the external forces cancel each other out) then the object will maintain a constant velocity. If that velocity is zero, then the object remains at rest. If an external force is applied, the velocity will change because of the force.

The second law explains how the velocity of an object changes when it is subjected to an external force. The law defines a force to be equal to change in momentum (mass times velocity) per change in time. Newton also developed the calculus of mathematics, and the "changes" expressed in the second law are most accurately defined in differential forms. (Calculus can also be used to determine the velocity and location variations experienced by an object subjected to an external force.) For an object with a constant mass m, the second law states that the force F is the product of an object's mass and its acceleration a:

F = m * a

For an external applied force, the change in velocity depends on the mass of the object. A force will cause a change in velocity; and likewise, a change in velocity will generate a force. The equation works both ways.

The third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal force on object A. Notice that the forces are exerted on different objects. The third law can be used to explain the generation of lift by a wing and the production of thrust by a jet engine.

2006-09-11 07:07:37 · answer #2 · answered by ★HigHTƹcH★ 7 · 0 0

Newton's First Law :
'An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force'.

Newton's Second Law :
'The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.'

F=MA

Newton's Third Law :
'For every action, there is an equal and opposite reaction'.

2006-09-11 07:04:49 · answer #3 · answered by Krish 2 · 1 0

women should be worshiped by their man
men are to worship their women
woman are the reason men dont have to masturbate,or at least so often

2006-09-11 07:07:56 · answer #4 · answered by melhtims 2 · 0 0

White men can't jump
You've got to get up to get down
The locomotion

2006-09-11 07:02:24 · answer #5 · answered by Anonymous · 0 0

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