- #1
salami
- 1
- 0
OK this is about a bullet hitting a block on wheels (inelastic collision), no friction or energy losses in the problem.
I'm trying to find Velocity of the system after collision
Why is it that if I use conservation of momentum I get a different answer of V than if I used conservation of Kinetic energy.
Momentum
m1*v1=(m1+m2)*v2
K energy
0.5*m1*v1^2=0.5*(m1+m2)*v2^2
You can make up your own numbers...I just don't understand the physics!
I'm trying to find Velocity of the system after collision
Why is it that if I use conservation of momentum I get a different answer of V than if I used conservation of Kinetic energy.
Momentum
m1*v1=(m1+m2)*v2
K energy
0.5*m1*v1^2=0.5*(m1+m2)*v2^2
You can make up your own numbers...I just don't understand the physics!