P2207_fall10_lecture5

# P2207_fall10_lecture5 - Which ball hits the ground first?...

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Today: Motion in a plane (2-D motion) The key to 2-D (and 3-D) motion Specifying vectors Vector addition and subtraction Position r(t), velocity v(t), acceleration a(t)
A mass m connected to a spring of spring constant k is initially displaced a distance x 0 from its equilibrium position. Using dimensional analysis , determine a relation between the maximum velocity v max of the mass during its oscillation and the quantities m , k , and x 0 . Note: [ k ]=kg/s 2 A. v max x 0 ( k / m ) B. v max x 0 k m C. v max = x 0 ( k / m ) 1/2 D. v max x 0 ( k / m ) 1/2 E. v max x 0 ( m / k ) 1/2 m k x 0

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Two balls are launched simultaneously from the same height, one starting from rest and dropping straight down, the other given an initial horizontal velocity.

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Unformatted text preview: Which ball hits the ground first? A. Ball “A” B. Ball “B” C. Both at same time “A” “B” Motion in a Plane (2-D Motion) Motion in a Plane (2-D Motion) How to specify/describe 2-D Motion? Which correctly describes the components of ? A x y A A. and B. and C. and D. and E. None of the above. x A y A x A y A x A y A x A y A Which correctly describes the components of ? A A. and B. and C. and D. and E. None of the above. x A y A x A y A x A y A x A y A x y A...
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## This note was uploaded on 10/27/2010 for the course PHYS 2207 at Cornell.

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P2207_fall10_lecture5 - Which ball hits the ground first?...

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