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January 28, 2015

January 28, 2015

Posted by **andrew** on Thursday, April 12, 2012 at 11:20am.

- physics (mechanics) -
**Steve**, Thursday, April 12, 2012 at 11:41amman velocity: x

boy velocity: b

1/2 (2m)x^2 = 1/2 * 1/2 my^2

4x^2 = y^2

1/2 (2m)(x+1.3)^2 = 1/2 my^2

2(x+1.3)^2 = 4x^2

x^2 + 2.6x + 1.69 = 2x^2

x^2 - 2.6x - 1.69 = 0

x = 3.138

check:

1/2 (2m)*3.138^2 = 1/2 * 1/2 m*6.276^2

9.847 = 1/2 * 19.694 = 9.847

1/2 (2m)*4.438^2 = 1/2 m*6.276^2

19.694 = 19.694

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