physics

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an 8g bullet is shot into a 4kg block, at rest on a frictionless surface. the bullet remains lodged in the block. the block moves into a spring and compresses it 9.40cm. the force constant of the spring is 1000 N/m.

a) what is the initial velocity of the bullet
b) how much energy is lost in the collision between the bullet and the block?
c) what is the impulse of the block due to the spring?

  • physics -

    Find the energy the spring absorbed.Taht is the KE of the bullet/block. From that, find the velocity of the bullet/block, then the momentum. Taht momentum came from the bullet before impact, so find the velocity of the bullet.

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