A 60-Kg Object,initially at Rest in Free Space,"explodes" into Three Segments

question 67

Multiple Choice

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 $\degree$ 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

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