Formula Sheet-physics test2

Formula Sheet-physics test2 - n-t coordinates t-axis:...

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cos ; Fn=ma θ n ; Nsin =mv θ 1 2 /R; v 1 =(gRtan ) β peed): =ma n ; Nsin + β μ s Ncos θ s in ) θ n-t coordinates t-axis: tangential axis(tangent to trajec.; same direction as v) normal axis(x-axis)-pointing toward inside of curve v vec=directon(+tand magn. ds/dt) acceleration: a(vec)=a t t + a n n= (a t 2 +a n 2 ) 1/2 a t -tang. Accel (change in speed) = dv/dt a n -normal accel. (change of direction) = v 2 /R R-radius of curvature circular motion a t =dv/dt a n =a rad =v 2 /R (R is radius of circle) Uniform circular motion: v=constant A t =0, v=(2piR/T) = 2piRf A n =a rad =v 2 /R = 4pi 2 R/T 2 =4pi 2 Rf 2 Note is used for angle; need to draw it out and use properties β of angles (supplementary ext.) Newton’s Laws-General Force-interaction of one body on another Characterized by magnitude, direction, and point of application Resultant-net force (combo of all forces) 1 st law: F=0, a=0, v=constant (equilibrium) Body at rest, stay at rest; body in motion move with constant velocity Inertia-tendency to remain at rest Inertial frame-non-accel. Coordin. System 3 rd law: every action equal reaction f 1-2 =-F 2-1 2 nd LAW: F=ma unit:N=kg•m/s 2 Est. by 1 st law FBD 1. Identify system to be analyzed (single body,
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This note was uploaded on 04/06/2008 for the course PHYS 2305 taught by Professor Tschang during the Fall '08 term at Virginia Tech.

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Formula Sheet-physics test2 - n-t coordinates t-axis:...

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