Physics Lab 5

# Physics Lab 5 - The Ballistic Pendulum: Inelastic and...

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The Ballistic Pendulum: Inelastic and Elastic Collisions Laboratory #5 Michael Dark Section 106 Ashley Pearson

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Purpose The purpose of this lab was to determine the velocity of a projectile using two- dimensional free fall equations, to use a ballistic pendulum to analyze two types of collisions, elastic and inelastic, and to utilize the conservation of mechanical energy principle in analyzing the motion of the ballistic pendulum after a collision has occurred. Theory (M + m)V combo (0) = P NET after = P NET before = mv o where V combo is the time-dependent velocity of the combined masses after the collision. t = x d /v o where x d is the distance and v o is the velocity. y d = -1/2*g*t 2 where y d is the distance in the y directions, g is gravity, and t is time. v o = x d * √g/2*y d where v is the velocity, x d is the distance in the x direction, g is the acceleration due to gravity, and y d is the negative distance in the y direction. V combo (0) = √2*g*H where g is the gravity and H is the rise in height. H = L(1-cos(θ m ) where H is the rise in masses, L is the effective length of the pendulum, and θ m is the angle at which the pendulum swings. An alternate method of determining V combo (0) = L/57.3 * ∆θ/∆t Where 57.3 is the number of degrees in one radian, ∆θ is the change in angle, and ∆t is the change in time. Procedure
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## This note was uploaded on 04/07/2008 for the course PHYS 111 taught by Professor Cui during the Spring '07 term at UMBC.

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Physics Lab 5 - The Ballistic Pendulum: Inelastic and...

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