Identical Particles Are Placed at the 50-Cm and 80-Cm Marks

question 62

Multiple Choice

Identical particles are placed at the 50-cm and 80-cm marks on a meter stick of negligible mass. This rigid body is then mounted so as to rotate freely about a pivot at the 0-cm mark on the meter stick. If this body is released from rest in a horizontal position, what is the angular speed of the meter stick as it swings through its lowest position?

• A) 4.2 rad/s
• B) 5.4 rad/s
• C) 4.6 rad/s
• D) 5.0 rad/s
• E) 1.7 rad/s

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Definitions:

Operant Conditioning

A process of learning in which the dynamics of behavior are adjusted by assigning incentives or penalties.

Extinction

In psychology, the gradual weakening and disappearance of a conditioned response tendency.

Variable-Ratio

A reinforcement schedule in which a response is rewarded after an unpredictable number of responses, commonly used in operant conditioning.

Fixed-Interval

A schedule of reinforcement where the first response is rewarded only after a specified amount of time has elapsed.