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Grogerian
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Homework Statement
Find the total kinetic energy in the system. a explosion fires two pieces both 7.3m high and 11.2m horizontally total kinetic energy done by the explosion the first piece is 15kg, the second 26kg?
Homework Equations
kinematics
Ke=1/2(mv2)
The Attempt at a Solution
I found that Vi(y) = [tex]\sqrt{2(9.81)(-7.3)}[/tex] = 11.96 m/s do i just use this to find the total energy done? or do i need to consider the x-dir as well, If so how do i do that?