1 dt with p mv and assuming m is constant we

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Unformatted text preview: ear momentum. Equa6on (1) is a vector equa6on. In terms of 3D Cartesian coordinates it can be wri]en as: p1x + p2 x = const p1y + p2 y = const p1z + p2 z = const Newton’s second law revisited In a more general form Newton’s second law is stated as dp Fnet = .............(1) dt With p = mv and assuming m is constant we retrieve the form of Newton’s law we had before d dv Fnet = ( mv ) = m = ma dt dt The more general statement of Newton’s second law can thus be stated as: The ;me rate of change of linear momentum of a par;cle is equal to the net force ac;ng on the par;cle. Note that if Fnet = 0 in equa;on(1), we get p = const, which is the principle of conserva6on of linear momentum Impulse We can write Newton’s second law as From this we get Δp = p f − pi = tf dp ∑ F = dt Fdt .............(1) ∫∑ ti The vector quan6ty on the right side of this equa6on is called the...
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