A Giant Wheel, Having a Diameter of 40 M, Is

question 71

Multiple Choice

A giant wheel, having a diameter of 40 m, is fitted with a cage and platform on which a man of mass m stands. The wheel is rotated in a vertical plane at such a speed that the force exerted by the man on the platform is equal to his weight when the cage is at X, as shown. The net force on the man at point X is:

• A) zero
• B) mg, down
• C) mg, up
• D) 2 mg, down
• E) 2 mg, up

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Definitions:

Decay Theory

A theory that proposes memory fades due to the mere passage of time unless it is actively rehearsed.

Interference Theory

A theory that explains forgetting in the human memory as a result of conflicting information interfering with the retrieval of stored memories.

Forgetting

The loss or decline in the ability to recall or recognize something that was previously learned or experienced.

Prospective Memory

Recalling a previously planned intention or executing a predetermined action at a future date.