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PHYSICS 101 FORMULAS

# PHYSICS 101 FORMULAS - Chapter 2 Motion in 1-D x xf xi xt0...

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Chapter 2: Motion in 1-D ∆x x f - x i , ∆x ∆t 0 v∆t Average speed = Total distance/Total time v = ∆x/∆t a ∆v/∆t , v 2 – v o 2 /2a, a = -g = -9.8 m/s 2 v = v o + at ∆x = x - x o = v o t + ½ at 2 v 2 = v o 2 + 2a∆x v 2 – v 0 2 = 2a∆x Chapter 3: Vectors & 2-D Motion A x = A cos θ, A y = A sin θ A = √ (A x 2 + A y 2 ) tan θ = A y / Ax , θ = tan -1 A y / A x R = A + B R x = A x + B x , R y = A y + B y v x = v 0x + a x t ∆x = v 0v t + ½ a x t 2 v x 2 = v 0x 2 + 2a x ∆x v 0y = v 0 sin θ 0 v y = v 0y + a y t ∆y = v 0y t + ½ a y t 2 v y 2 = v 0y 2 + 2a y ∆y v = √ (v x 2 + v y 2 ) θ = tan -1 v y v x Equations for projectiles close to the Earth equations for the motion in the horizontal or x-direction: v x = v 0x = v 0 cosθ 0 = constant ∆x = v 0x t = (v 0 cosθ 0 ) t Equations for the motion in the vertical or y-direction: v y = v 0 sin θ 0 – gt ∆y = (v 0 sin θ 0 ) t – ½ gt 2 v y 2 = (v 0 sin θ 0 ) 2 – 2g∆y 3.5 Relative Velocity Let E be an observer, and B be a second observer traveling with a velocity v BE as measured by E If E measures the velocity of an object A as v AE

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