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I need help with this question please, thank you.  

 Oct 11, 2019
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Conservation of momentum

m1 v1 = m2 v2

5 *3 + 3 *2  = (5+3) v2

21/8 = v2   = 2.625 m/s

 

Kinetic energy = 1/2 mv^2      initially     =    1/2 5000 (3^2) + 1/2 3000 (2^2 ) = 2,8500 kg m^/s^2

     after =      1/2 8000  2.625^2 =27,562.5        Difference = 937.5 kg - m^2/s^2

 Oct 11, 2019
edited by ElectricPavlov  Oct 11, 2019

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