- #1

AL115

- 14

- 0

According to the first equation, the final potential energy is equal to the initial kinetic energy of the block. So that means that Vblok is the instantaneous speed of the block right before it moves to the right and compress the spring, right? But doesn't the second equation (The initial total momentum = the final total momentum) tell us that the moment where the block has the speed Vbolk = 1.5 m/s is the same moment where the bullet have its final speed (100m/s) after it emerges from the the block? Does that mean that the block started moving to the right after the bullet emerged from it? How? Wouldn't the force that is applied by the bullet on the block move the block before the bullet emerges?

I am very sorry if I was unclear.