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**Unformatted text preview: **. 9 2 ) kg 80 . ( s m kg 12 . 1 2 2 k = = b) ( 29 ( 29 ( 29 ( 29 J. 291 s m 120 s m 400 kg 10 00 . 4 2 2 3 2 1 =--c) From the calculation of the momentum in part (a), the blocks initial kinetic energy was . J 784 . kg) 80 . ( 2 ) s m kg 12 . 1 ( 2 2 2 = = m p...

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