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Introductory Physics Homework Help
Calculate Magnitude of Impulse on 920-kg Car
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[QUOTE="Rawrr!, post: 4530051, member: 490024"] The Impulse in classical mechanics can be understood as the average force multiplied by the time it is exerted. J = F[SUB]average[/SUB] (t[SUB]2[/SUB] - t[SUB]1[/SUB] ) J = ∫ F dt , evaluated from t[SUB]1[/SUB] to t[SUB]2[/SUB] since F is related to the change in momentum with respect to time, J = ∫ (dp/dt) dt , evaluated from t[SUB]1[/SUB] to t[SUB]2[/SUB] here, the dt's cancel, and you get, J = ∫ dp , evaluated from P[SUB]1[/SUB] to P[SUB]2[/SUB] so, finally you get to J = p[SUB]2[/SUB] - p[SUB]1[/SUB] = ΔP You suggested subtracting the two. Make sure to subtract them in the correct order to obtain the correct sign. [/QUOTE]
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Calculate Magnitude of Impulse on 920-kg Car
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