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A block of mass 0.50 kg is moving with a speed of 2.00 m/s on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

5 years ago

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Answers : (2)

                                        

Dear vipin


doing conservation of momentum


new  v = 0.5*2/1+0.5


 = 1/1.5 =2/3


energy loss = k.e final-k.e initila


= 0.5(1.5*(0.66*0.66) - 0.5*2*2)


= -0.6666


therefore energyloss = 0.6666n-m



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5 years ago
                                        

Dear Vipin,


We know that momentum should be conserved


gives 0.5*2 = (1+0.5)*v


where v i the velocity of entire mass system moving after collision...


v=(1/1.5) m/s


energy lost = kinetic energy of the system before collision - kinetic energy of the system aftr collision


                 = 1/2*0.5*22 -1/2* 1.5 *(1/1.5)2


                 =0.6667 Joules


All the best for IITJEE preparation,


 


With Regards,


Adapa Bharath

5 years ago

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