A Block of Mass M = 3 $\mathrm { v } _ { \mathrm { i } } = 9.3 \mathrm {~m} / \mathrm { s }$

question 186

Multiple Choice

A block of mass m = 3.6 kg,moving on a frictionless surface with a speed $\mathrm { v } _ { \mathrm { i } } = 9.3 \mathrm {~m} / \mathrm { s }$ makes a sudden perfectly elastic collision with a stationary block of mass M,as shown in the figure.Just after the collision,the 3.6-kg block recoils with a speed of $v _ { \mathrm { f } } = 2.7 \mathrm {~m} / \mathrm { s }$ What is the speed V of the other block?

• A)6.6 m/s
• B)8.0 m/s
• C)9.3 m/s
• D)10.7 m/s
• E)12.0 m/s

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Definitions:

Flashbulb Theory

A theory suggesting that the memory for the circumstances in which one first learned of a very surprising and emotionally arousing event is vivid and detailed, as if a photo was taken.

Arousal Theory

A theory in psychology that suggests there is an optimal level of arousal for each individual that leads to the best performance on tasks; too little or too much arousal can decrease performance.

Equipotentiality Theory

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