Explanation Given: Mass of child = 16.0 kg Initial height of child ( h 1 ) =2 .20 m Initial velocity of child ( V 1 ) =0 .0 m/s Final height of child ( h 2 ) =0 .0 m/s (Reference level) Final speed of child ( V 2 ) =1 .25 m/s Formulaused: W N C = Δ K E + Δ P E = ( 1 2 m V 2 2 - 1 2 m V 1 2 ) + ( m g h 2 - m g h 1 ) Work done by friction force converted into thermal energy W N C : Work done by non-conservative force (friction) Calculation: P . E 1 = m g h 1 = ( 16 .0 kg ) ( 9 .8 m/s 2 ) × ( 2 .20 m ) K . E 1 = 1 2 m V 1 2 = 1 2 × ( 16 .0 kg ) ( 0 m/s ) = 0 P . E 2 = m g h 2 = ( 16 .0 kg ) ( 9

7th Edition

ISBN: 2818440037979

Author: GIANCOLI

Publisher: PEARSON

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Chapter 6, Problem 47P

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The amount of thermal energy generated due to friction in the process.

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