A 14-Kg Beam Is Hinged at One End

question 16

Multiple Choice

A 14-kg beam is hinged at one end. A 6.0-kg triangular object and a 7.5-kg I-shaped object are positioned as shown. Dots indicate the individual centers of gravity of the beam and the two objects. What is the distance from the axis of rotation to the center of gravity for this system?

• A)1.3 m
• B)1.1 m
• C)0.96 m
• D)0.89 m
• E)0.71 m

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Definitions:

Buffers

Substances that help maintain the pH balance in a solution, resisting changes in pH when acids or bases are added.

Alkaline

Referring to a basic, as opposed to acidic, substance with a pH level greater than 7.

Hydroxide Ions

Negatively charged ions, OH-, produced when a hydroxide compound dissolves in water, basic in nature.

Bases

Substances that accept protons according to the Brønsted-Lowry definition or donate electrons in the Lewis definition, commonly displaying a pH greater than 7.