PHYSICS HELP MEEE SO CONFUSED

posted by .

Liam fires a bullet into a block suspended by two cables, embedding the bullet in the block. The mass of the bullet is 5g and the mass of the block is 1g.
1) If the maximum height of the block is ,h, is 35 cm, how fast was the bullet originally moving?

(can you explain the steps i'm really confused)

  • PHYSICS HELP MEEE SO CONFUSED -

    I think there's more to this question.

    Are the cables there to provide resistance to motion of the block? If so, what parameters?

    Is the bullet fired straight up?

    conserve momentum as the moving mass changes.

  • PHYSICS HELP MEEE SO CONFUSED -

    1) From the height H that the block+bullet rises, assuming conservation of energy for the process, calculate the initial velocity V' of the block after the bullet is embedded.
    (m+M) V'^2/2 = (m+M) g H
    V' = sqrt(2 g H) = 2.62 m/s

    2) Momentum (but not mechanical energy) is conserved during the bullet-embedding process. If V is the initial bullet velocity,
    mV = (m+M) V'

    Solve for V.
    m is the bullet mass and M is the block's mass.
    Are you sure the block is lighter that the bullet?

  • PHYSICS HELP MEEE SO CONFUSED -

    oops its 1 kg

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A 2.50g bullet, traveling at a speed of 425m/s, strikes the wooden block of a ballistic pendulum. The block has a mass of 270g (a) find the speed of the bullet/block combination immediately after the collision (b) how high does the …
  2. Mechanical engineering

    A bullet of mass 50 grams is fired horizontally into a wooden block of mass 0.2kg. The wodden block is suspended from the ceiling by a long string as shown in the diagram. After impact the bullet is embedded in the block and bullet …
  3. physics

    A heavy wooden block rests on a flat table and a high-speed bullet is fired horizontally into the block, the bullet stopping in it. How far will the block slide before coming to a stop?
  4. physics

    A heavy wooden block rests on a flat table and a high-speed bullet is fired horizontally into the block, the bullet stopping in it. How far will the block slide before coming to a stop?
  5. AP Physics

    Liam fires a bullet into a block suspended by two cables, embedding the bullet in the block. The mass of the bullet is 5g and the mass of the block is 1g. 1) If the maximum height of the block is ,h, is 35 cm, how fast was the bullet …
  6. pHysics !!

    A 20-g bullet is fired horizontally into a 980 g block of wood suspended by a long cord. The bullet sticks in the block and causes the block to swing 15 cm above its initial level. a) What is the momentum of the bullet before it hit …
  7. Physics

    A heavy wooden block rests on a flat table and a high-speed bullet is fired horizontally into the block, the bullet stopping in it. How far will the block slide before coming to a stop?
  8. physics

    A 12.0 g bullet is fired into a 13.9kg wooden block that is hanging straight down, suspended by a 2.00 m length of light line. The bullet has a muzzle velocity of 94.2 m/s. When the bullet hits the block, the bullet stays in the block. …
  9. physics

    A block of wood with a mass of 1300g is sitting on a horizontal tabletop. The coefficient of kinetic friction between the block and table is ┬Ák=0.74.A rifle bullet with a mass of 39g is fired horizontally into the block at a sped …
  10. Physic

    A 60-g bullet fired at two blocks resting on a surface with coefficient of kinetic friction =0.5. The bullet pass through a 8-kg block and make this block slides 0.8 m. And then the bullet lodges in another block which is 6 kg. The …

More Similar Questions