physics

posted by .

A bullet of mass m= 0.0290 kg is fired along an incline and imbeds itself quickly into a block of wood of mass M= 1.55 kg. The block and bullet then slide up the incline, assumed frictionless, and rise a height H= 1.65 m before stopping. Calculate the speed of the bullet just before it hits the wood. Note. The block is kept from sliding down the incline initially by as small peg

  • physics -

    The distance H that is slides vertically up the incline can be used to determine the velocity V AFTER impact. Conservation of energy gives you

    (1/2) V^2 = g H

    Knowing V, you can then solve for v (the bullet velocity before impact). Get it from the conservation of momentum relation:
    m v = (M+m) V
    m = bullet mass
    M = wood block mass

    v = [(M+m)/m]*sqrt(2gH)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. 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?
  2. 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?
  3. physics

    An 7.95 g bullet is fired horizontally into a 9.03 kg block of wood on an air table and is embedded in it. After the collision, the block and bullet slide along the frictionless surface together with a speed of 11.6 cm/s. What was …
  4. physics

    A 0.145 kg block is released from rest from the top of a 51.7◦ frictionless incline. When it has fallen a vertical distance of 1.3 m, a 0.00794 kg bullet is fired into the block along a path parallel to the slope of the incline, …
  5. physics

    A 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.16 kg) and embeds itself in block 2 (mass 1.85 kg). The blocks end up with speeds v1 = 0.560 m/s and v2 …
  6. Physics

    A block of mass m 1 sits at rest on a table over a hole in the table. From below the table, a bullet of mass m 2 is fired vertically upwards into the block. The bullet imbeds itself in the block. The block and bullet rise to a maximum …
  7. Physics

    An 8.00g bullet is fired at 220m/s into a 250g wooden block that is initially at rest. The bullet remains in the block and after the collision the two slide up a 30° incline. a. Solve for the velocity of the bullet-block after the …
  8. Physics

    An 8.00g bullet is fired at 220m/s into a 250g wooden block that is initially at rest. The bullet remains in the block and after the collision the two slide up a 30 degree incline. a) Solve for the velocity of the bullet block after …
  9. Physics

    A bullet of mass m= 2.50×10-2kg is fired along an incline and imbeds itself quickly into a block of wood of mass M= 1.60kg. The block and bullet then slide up the incline, assumed frictionless, and rise a height H= 1.45m before stopping. …
  10. 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 µk=0.74.A rifle bullet with a mass of 39g is fired horizontally into the block at a sped …

More Similar Questions