• Post a New Question
• Current Questions
• Chat With Live Tutors

Homework Help: Physics

Posted by Jason on Monday, August 6, 2012 at 8:34pm.

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 height h. What is the bullet’s initial speed? Answer in
terms of m 1, m 2, h, and g.

• Physics - Elena, Tuesday, August 7, 2012 at 4:59am

  The law of conservation of linear momementum
  m1•v +0=(m1+m2) •u
  v=(m1+m2) •u/m1.
  The law of conservation of energy
  (m1+m2) •u²/2=(m1+m2) •g•h,
  u=sqrt(2•g•h).
  v=(m1+m2) •u/m1= (m1+m2) •sqrt(2•g•h)/ m1.
  

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - A 3.2 kg block sits on a frictionless table that has a hole cut in the...
Physics - A wooden block of mass 29.0 kg sits on a horizontal table. A wire of ...
physics - A 4 kg wooden block rest on a table. the coefficient of friction ...
Physics - A 12kg blcok sits on a table. A 10 kg block sits on top of the 12kg ...
physics - As shown in the figure, a block of mass M1 = 0.470 kg is initially at ...
physics - A mass m1 = 6.0 kg sits on a frictionless table, and rotates at a ...
Physics - A wooden block with mass 0.26{\rm kg} rests on a horizontal table, ...
Physics - A block of mass m1 = 4.80 kg sits on top of a second block of mass m2...
Physics - When the three blocks in the figure below are released from rest, they...
Physics - Block 1 sits on a table with rope that is attached to block 2 hanging ...

For Further Reading