two metal spheres of mass 3 kg and 2kg are moving in the opposite direction with velocity of 15 metre per second and 10 metre per second respectively after the collision is they sticks to each other and a travel simultaneous please find the velocity after collision...
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Given : m1 =3. kg m2 =2 kg urel =15 m/s
vrel =5 m/s
So, e=urel/ vrel=15/5=3/1
Loss in kinetic energy ΔK.E=
2/1 (m1+m2/m1m2) (1−e2 )(urel )
Or ΔK.E= 2/1 (3+2/3×2 )(1−1/3²)(15)²=120 J
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