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lectureslides05

# lectureslides05 - Phy 2053 Chapter sections 3.3 to 3.5...

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Motion in 2 Dimensions First a Quick Review of Vectors and Scalars •A scalar is completely specified by a single number vector has both magnitude and direction -in 2 dimensions it is represented by 2 numbers: (a) magnitude and angle or (b) 2 components {for example x and y} Phy 2053 Chapter sections 3.3 to 3.5 Thursday, Sept. 6, 2007 Motion in Two Dimensions • Using + or – signs is not always sufficient to fully describe motion in more than one dimension – Vectors can be used to more fully describe motion • Still interested in displacement, velocity, and acceleration Displacement, Velocity, and Acceleration • The position of an object is described by its position vector, • The displacement of the object is defined as the change in its position (meter) Velocity (meter/sec) Acceleration (meter/sec 2 ) r r fi ∆= − rr r av t r v = av t v a can change speed, direction, or both av a We will be specialists in Projectile Motion!

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lectureslides05 - Phy 2053 Chapter sections 3.3 to 3.5...

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