Jane and Jake Are Looking at What Happens to Body

question 42

Multiple Choice

Jane and Jake are looking at what happens to body 1 of mass m and body 2 of mass 2m, initially at rest, when equal forces are applied separately to the two bodies. Jake says that equal forces applied for equal times do equal amounts of work on the two bodies. Jane says that the two forces do equal amounts of work only if the two bodies move equal distances in the direction of the forces. Which one, if either, is correct?

• A) Jake, because the speed of body 1 is half the speed of body 2, but m₁v₁ = m₂v₂.
• B) Jane, because work does not depend on mass, only on force times distance.
• C) Jake, because all bodies travel equal distances when equal forces are applied for equal times.
• D) Jane, because it takes the same time for all bodies to travel equal distances when equal forces are involved.
• E) Neither, because we can't compare the amounts of work done on bodies of different mass.

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Definitions:

Maintenance Rehearsal

A cognitive strategy for keeping information active in short-term memory by repetitively verbalizing or thinking about the information.

Elaborative Rehearsal

A memory technique that involves thinking about the meaning of the information and making connections to other information in memory.

Retrograde Amnesia

A loss of memory for events that occurred before a specific point in time, often due to injury or illness affecting the brain.

Coma

A deep state of prolonged unconsciousness in which a person cannot be awakened and fails to respond to painful stimuli, light, or sound.