A Massless Meter Stick on a Horizontal Frictionless Table Top

question 34

Multiple Choice

A massless meter stick on a horizontal frictionless table top is pivoted at the 80-cm mark.A force is applied perpendicularly to the end of the stick at 0 cm, as shown.A second force (not shown) is applied perpendicularly at the 60-cm mark.The forces are in the plane of the table top.If the stick does not move, the force exerted by the pivot on the stick:

• A)must be zero
• B)must be in the same direction as and have magnitude
• C)must be directed opposite to and have magnitude
• D)must be in the same direction as and have magnitude
• E)must be directed opposite to and have magnitude

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Definitions:

Consciousness

The state of being aware of and able to think about one's surroundings, thoughts, and feelings.

Hypnosis

An altered state of consciousness or a psychological state of altered attention and expectation in which the individual is unusually receptive to suggestions.

Hypnosis

A trance-like mental state in which a person becomes highly suggestible and is able to focus intensely on a specific thought or memory, excluding any other thoughts.

Somniloquy

The act of talking during sleep, a type of parasomnia that can occur in any stage of sleep.