Block A, with a Mass of 4

question 27

Multiple Choice

Block A, with a mass of 4.0 kg, is moving with a speed of 2.0 m/s while block B, with a mass of 8.0 kg, is moving in the opposite direction with a speed of 3.0 m/s.The center of mass of the two-block system is moving with the velocity of:

• A)1.3 m/s in the same direction as A
• B)1.3 m/s in the same direction as B
• C)2.7 m/s in the same direction as A
• D)1.0 m/s in the same direction as B
• E)5.0 m/s in the same direction as A

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Definitions:

Dual Processing

The principle that our mind operates on two levels simultaneously: conscious and unconscious.

Cocktail Party Effect

The ability to focus one's listening attention on a single talker among a mixture of conversations and background noises.

Selective Attention

The cognitive process by which an individual focuses on one particular object or message among a range of stimuli, ignoring others.

Inattentional Blindness

The psychological phenomenon where an individual fails to perceive an unexpected stimulus in plain sight because their attention is engaged elsewhere.