A 20-Kg Object Moving 3

question 75

Multiple Choice

A 2.0-kg object moving 3.0 m/s strikes a 1.0-kg object initially at rest. Immediately after the collision, the 2.0-kg object has a velocity of 1.5 m/s directed 30° from its initial direction of motion. What is the x component of the velocity of the 1.0-kg object just after the collision?

• A) 3.7 m/s
• B) 3.4 m/s
• C) 1.5 m/s
• D) 2.4 m/s
• E) 4.1 m/s

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Definitions:

Drugs

Substances that are used to treat, cure, prevent, or diagnose a disease or to promote well-being.

EEG Pattern

The recording of electrical activity in the brain, analyzed in patterns to diagnose conditions or to understand neurological function.

Sleep Pattern

The habitual arrangement of the cycles of sleep and wakefulness over a 24-hour period.

Substance Dependence

Diagnosis given in the DSM-IV when a person’s substance use leads to physiological dependence or significant impairment or distress, as manifested by an inability to use the substance in moderation; a decline in social, occupational, or recreational activities; or the spending of large amounts of time obtaining substances or recovering from their effects.