Lec04_Sum_f - Summary Lecture 4 A scalar is a quantity...

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1 Lecture 4 Projectile Motion Physics 111, Summer 2011, June 16, Lecture 4 Summary A scalar is a quantity which has the magnitude only. Examples: mass, length, time, volume, temperature. A vector is a quantity which has the magnitude and direction. Examples: displacement, velocity, force. pp y A vector has components along horizontal ( x ) and vertical ( y ) directions (axes). Horizontal component of the vector (along the x -axis): θ cos A A x = Vertical component of the vector (along the y -axis): sin A A y = A r A r Moving object may have different velocity relatively another objects; to find relative velocity, we have to use vectors. 2 An object can move in two dimensions (along both the x - and y -axes); an example of such a motion is projectile motion. Physics 111, Summer 2011, June 16, Lecture 4 Velocity vs. Time The slope of a velocity vs. time graph is: 1) distance 2) velocity 3) acceleration 4) displacement v v Δ t Δ t 2 2 , t v 2 1 , t v 3 a t v t t v v slope = Δ Δ = = 1 2 1 2 Physics 111, Summer 2011, June 16, Lecture 4 Projectile Motion 4 Physics 111, Summer 2011, June 16, Lecture 4
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2 Projectile Motion A projectile is any object that is given an initial velocity and then follows a path determined by the horizontal and vertical motion (air resistance is important by Simultaneous motion in horizontal and vertical directions. 0
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Lec04_Sum_f - Summary Lecture 4 A scalar is a quantity...

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