The change in the momentum of the parcle is equal to

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Unformatted text preview: impulse of the net force ∑ F ac6ng on a par6cle over the 6me interval Δt = tf –ti and is denote by I : I= tf Fdt .............(2 ) ∫∑ ti Direc6on of impulse is same as direc6on of the change in momentum It is clear that if we plot ∑ F vs t, the area under the curve and between ti and tf gives the magnitude of I . From equa6on (1) and (2), we obtain the impulse ­momentum theorem. The change in the momentum of the par;cle is equal to the impulse of the net force ac;ng on the par;cle: Δp = I In many physical situa6ons, the impulse real impulse is approximated by assuming that one of the forces exerted on a par6cle acts for a short 6me but with much greater than any other force present. This is called impulse approxima;on. Example A tennis player hits a ball (60 g) during a tennis match. The ball changes ini;ally from re...
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This note was uploaded on 11/16/2010 for the course PHY 2170 taught by Professor Blank during the Spring '08 term at Wayne State University.

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