- #1
heycoa
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I must be thinking way to hard about this problem. Can someone please give me a nudge in the right direction?
A shell traveling with speed v0 exactly horizontally and due north explodes into two equal mass fragments. It is observed that just after the explosion one fragment is traveling vertically up with speed v0. What is the velocity of the other fragment?
Let M=m1+m2 (the mass of the shell before explosion equals the sum of the masses of the fragments)
Conservation of momentum: v0*M=v0*m1+V2*m2 (where V2 is the vector pointing in the x direction and v0*m1 is the momentum of the fragment traveling directly upwards)
When I work this out, everything pretty much cancels out and V2 = v0. Except I think this is too easy. When I try to shift this problem so that the initial velocity of the shell is traveling in the x direction, and the fragments both exit with an x and y component with magnitudes at a 90 degree angle to each other, I get a completely different answer (V2=(2*sqrt(2)-1)*v0). And this doesn't seem right either.
Please give me a hand
Homework Statement
A shell traveling with speed v0 exactly horizontally and due north explodes into two equal mass fragments. It is observed that just after the explosion one fragment is traveling vertically up with speed v0. What is the velocity of the other fragment?
Homework Equations
Let M=m1+m2 (the mass of the shell before explosion equals the sum of the masses of the fragments)
Conservation of momentum: v0*M=v0*m1+V2*m2 (where V2 is the vector pointing in the x direction and v0*m1 is the momentum of the fragment traveling directly upwards)
The Attempt at a Solution
When I work this out, everything pretty much cancels out and V2 = v0. Except I think this is too easy. When I try to shift this problem so that the initial velocity of the shell is traveling in the x direction, and the fragments both exit with an x and y component with magnitudes at a 90 degree angle to each other, I get a completely different answer (V2=(2*sqrt(2)-1)*v0). And this doesn't seem right either.
Please give me a hand