A Ladder Is Extended to a Length of 8 M

question 14

Multiple Choice

A ladder is extended to a length of 8 m.It rests against a smooth frictionless vertical wall at an angle of 55 degrees to the horizontal.The ladder has a mass of 30 kg,and its center of mass is three-eighths of the way up the ladder from the floor.Calculate the magnitude of the resultant of the horizontal and vertical forces at the bottom of the ladder and the floor.

• A)371 N
• B)294 N
• C)77.0 N
• D)304 N
• E)284 N

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Definitions:

Batesian Mimicry

A form of mimicry where a harmless species evolves to imitate the warning signals of a harmful species to deter predators.

Poison Arrow Frog

A group of brightly colored frogs, native to tropical Central and South America, known for the potent toxin secreted through their skin.

Chemical Defenses

Strategies involving the production of chemical substances by organisms to deter predation, infection, or competition.

Mutualism

A type of symbiotic relationship between two species where both parties benefit from the interaction.