We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
66
1
avatar

I need help with this question please, thank you.  

 Oct 11, 2019
 #1
avatar+19797 
+1

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

20 Online Users

avatar