A 20-G Bullet Moving at 1000 M/s Is Fired Through

question 85

Multiple Choice

A 20-g bullet moving at 1000 m/s is fired through a one-kg block of wood emerging at a speed of 200 m/s. What is the change in the kinetic energy of the bullet-block system as a result of the collision assuming the block is free to move?

• A) "0 J"
• B) "-9.5 kJ"
• C) "9.5 kJ"
• D) "-18 J"

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Definitions:

Perfect Square Trinomial

A trinomial expression that is the square of a binomial, characterized by having three terms where two are perfect squares and one is double the product of the square roots of those squares.

Zero-Factor Property

A principle stating that if the product of two quantities is zero, then at least one of the quantities must also be zero.

Equation

An assertion in mathematics that two expressions, often containing variables and constants, are equivalent.

Trinomial

A polynomial equation or expression that consists of three terms.