An Object Initially at Rest Suddenly Explodes in Two Fragments $2.6 \mathrm {~kg}$

question 162

Multiple Choice

An object initially at rest suddenly explodes in two fragments of masses $2.6 \mathrm {~kg}$ and $3.3 \mathrm {~kg}$ that move in opposite directions. If the speed of the first fragment is $3.6 \mathrm {~m} / \mathrm { s } \text {, }$ find the internal energy of the explosion.

• A)30 J
• B)30 kJ
• C)38 J
• D)38 kJ

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