A stationary bomb explodes in space breaking into a number of small fragments. A

Question

A stationary bomb explodes in space breaking into a number of small fragments. At the location of the explosion, the net force due to gravity is zero newtons. Which one of the following statements concerning this event is true? i)State principle involved. ii) Explain.

A) Kinetic Energy is conserved in this process.
B) All of the fragments must have equal kinetic energies.
C) The sum of the kinetic energies of the fragments must be zero.
D)The Vector sum of the linear momenta of the fragments must be zero.
E) The mass of any one fragment must be equal to the mass of any other fragment.

Explanation / Answer

Heya,

This is D) The Vector sum of the linear momenta of the fragments must be zero.

Basically, the principle involved is that the momentum before must equal the momentum after; momentum must be conserved.

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