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Homework Help: Linear Momentum

  1. Apr 11, 2008 #1
    Please help me .

    (1)- A gun is fired vertically into a 1.4 kg block of wood at rest directly above it. If the bullet has a mass of 21 g and a speed of 310 m/s, how high will the block rise into the air after the bullet becomes imbeded in it ?

    (2)- A rocket of total mass 3700 kg is traveling in outer space with a velocity of 110 m/s toward the Sun. It wishes to alter its course by 35 degrees, and can do this by firing its rocket briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a speed of 1900 m/s, how much mass must be expelled ?
  2. jcsd
  3. Apr 11, 2008 #2


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    Staff: Mentor

    Elvis, you must show your own work and attempt at a solution before we can help you with homework/coursework problems (see the "Rules" link at the top of the page).

    What are the kinematic equations of motion that you will use to solve these problems? What energy balance equations can also be of help?
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