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  1. S

    Bullet shot into a block

    Homework Statement A bullet with a mass of 7.00g is fired horizontally with a speed of 450m/s , into a wooden block with mass of 0.810kg , initially at rest on a level surface. The bullet passes through the block and emerges with its speed reduced to 140m/s . The block slides a distance of...
  2. S

    Collision on an air track

    ok so I would set the initial kinetic energy equal to the final kinetic energy and solve for the velocity right?
  3. S

    Collision on an air track

    Wouldn't Kinetic energy also be conserved?
  4. S

    Collision on an air track

    Homework Statement A 0.147 glider is moving to the right on a frictionless, horizontal air track with a speed of 0.870 . It has a head-on collision with a 0.292 glider that is moving to the left with a speed of 2.20 . Suppose the collision is elastic. What is the magnitude of the final...
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