Newtons Third Law

Newtons Third Law - Newtons Third Law If a hammer exerts a...

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Newtons Third Law If a hammer exerts a force on a nail, the nail exerts an equal but oppositely directed force on the hammer. This is true in general, and is described by Newton's third law :' " Suppose a body A exerts a force (F BA ) on body B. Experiments show that in that case body B exerts a force (F AB ) on body A. These two forces are equal in magnitude and oppositely directed: " Note: Since the two members of an action-reaction pair always act on different bodies, they can not cancel each other. 5.4. Mass and Weight The mass of a body and the weight of a body are totally different properties. The mass m of a body is a scalar; its SI unit the kilogram. The mass of a body can be determined by comparing it to the standard kilogram. Mass is an intrinsic property of a body; it is the same on the earth's surface, in an orbiting satellite, on Mars, or in interstellar space. The weight of a body is a vector; its SI unit in the Newton. The weight of a body with mass m is defined as: where g is the free-fall acceleration at the location of the body. Since the free-fall acceleration

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This document was uploaded on 11/25/2011.

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Newtons Third Law - Newtons Third Law If a hammer exerts a...

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