week3-3 - Newtons First Law of Motion An object remains at...

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Unformatted text preview: Newtons First Law of Motion An object remains at rest, or in uniform motion in a straight line, unless it is compelled to change by an externally imposed force. Newtons Second Law of Motion The acceleration of an object is directly proportional to the magnitude of the imposed force and inversely proportional to the mass of the object. The acceleration is the same direction as that of the imposed force. F m a units : 1 newton = 1 N = 1 kg m s 2 Newtons Third Law (action/reaction) For every action (force), there is an equal but opposite reaction (force). 4 Ch 4 CP6 A 60kg person accelerating DOWN at 1.4m/s 2 a) What is the true weight (W)? b) What is the net force (F)? c) What is N? d) What is the apparent weight (AW)? a). W = 588 N, F = 84 N, N = 672 N, AW = 504 N b). W = 588 N, F = 84 N, N = 672 N, AW = 672 N c). W = 588 N, F = 84 N, N = 504 N, AW = 504 N d). W = 60 N, F = 84 N, N = 14 N, AW = 14 N e). W = 60 N, F = 84 N, N = 144 N, AW = 144 N Mg 1.4 m/s 2 N 5 Ch 4 CP6 A 60kg person accelerating UP at 1.4m/s 2 a) What is the true weight (W)?...
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week3-3 - Newtons First Law of Motion An object remains at...

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