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gcombina
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Homework Statement
QUESTION 1 :A stationary bomb explodes in space breaking into a number of small fragments. At the location of the explosion, the net force do to gravity is 0 Newtons. Which one of the following statements concerning the event is true?
a) Kinetic energy is conserved in the process
b) The fragments must have equal kinetic energies
c) The sum of the KE's of the fragments must be 0
d) The vector sum of the linear momenta of the fragments must be zero
e) The velocity of anyone fragment must be equal to the velocity of any other fragment
Homework Equations
mv (before) = mv (after)
The Attempt at a Solution
a) mv (before) = mv (after), velocity before is 0 and velocity after is 0 therefore, the KE is NOT conserved
b) there is NO KE as the bomb was stationary so it was zero velocity
c) KE must always be positive so it can NOT be 0
d) YES
e) The velocities of these fragments are zero, therefore the velocity of one fragment can be equal to other fragment so I don't understand this question