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Introductory Physics Homework Help
How much kinetic energy is released
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[QUOTE="gijungkim, post: 5054493, member: 548016"] [h2]Homework Statement [/h2] A 6.0-kg object, initially at rest in free space, “explodes” into three segments of equal mass. Two of these segments are observed to be moving with equal speeds of 20 m/s with an angle of 60° between their directions of motion. How much kinetic energy is released in this explosion? a.2.4 kJ b.2.9 kJ c.2.0 kJ d.3.4 kJ e.1.2 kJ [h2]Homework Equations[/h2] m1v1 + m2v2 + m3v3 = m1v1f + m2v2f + m3v3f K = 0.5*m*v^2 [h2]The Attempt at a Solution[/h2] The answer is c, 2000J, but I got 1500J and I don't know where I did wrong. Can anyone help me? My work is in the picture [/QUOTE]
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How much kinetic energy is released
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