Energy and its Conservation

Energy and its Conservation problem 43

A missile with a mass of moving at a speed of in a horizontal direction hits a fixed wooden board whose thickness d is . The missile exits on the other side of the board at a speed of . Assuming the board does not move during the collision.

  • How much work does the board resistance do when stopping the missile?

  • What is the average force of the board on the missile?

  • What must be the least thickness of the board so that the missile does not pierce it?

A missile projected at a board


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