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Solution 17.4b

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(New page: As the brick has no speed at the start <math>\text {KE = KE gained}</math>. Using Energy lost due to friction = Work done against friction we get, <math>\begin{align} & \text{PE lost - ...)
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Revision as of 09:46, 30 September 2010

As the brick has no speed at the start

KE = KE gained.

Using Energy lost due to friction = Work done against friction we get,

PE lost - KE gained = Work done against frictionwhich givesKE = KE gained = PE lost - Work done against friction

KE=29.832103.2=30.72 J212v2=30.72v=5.54 ms-1