review2011f

review2011f - Physics 3A - Review for what we must know...

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Physics 3A ---- Review for what we must know
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Problem Solving Strategies Conceptualize – Sketch the problem – Draw diagram(s) if necessary Analyze – List known and unknown quantities – Find the right equation(s) Finalize – Solve the equations – Give the answer (magnitude, unit, direction) – Estimate the reasonableness of the answer(s) Identify what , know how , understand why . Calculate carefully and answer correctly
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2 2 y x R R + x y 1 R R tan = θ Vectors A x B x A y B y cos AA θ = x sin y = Resolving to components Adding two vectors, algebraically or graphically Combine components to a resultant vector
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1D Kinematics Equations for motions with constant acceleration
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Rules of Projectile Motion The x- and y-directions of motion are completely independent of each other The x-direction is uniform motion a x = 0 The y-direction is free fall a y = -g The initial velocity can be broken down into its x- and y-components cos sin Ox O O Oy O O vv θθ == v x =v 0x =v 0 cos θ ; x=(v 0 cos θ ) t v y =v 0y -gt=v 0 sin θ -gt; y=(v 0 sin θ ) t - gt 2 /2 2
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review2011f - Physics 3A - Review for what we must know...

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