A Block Is Placed in Oscillation on a Frictionless Horizontal

question 37

Multiple Choice

A block is placed in oscillation on a frictionless horizontal surface attached to a spring that is also attached to a wall.If,when stretched away from equilibrium by 15 cm and released,it oscillates with a period of 0.25s,and if the mass of the block is 15 kg,what force was required to stretch the spring by the initial 15 cm?

• A) 230 N
• B) 450 N
• C) 710 N
• D) 360 N
• E) 1400 N

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Definitions:

Factor Analysis

Factor Analysis is a statistical method used to describe variability among observed, correlated variables in terms of a potentially lower number of unobserved variables called factors.

Single Trait

Refers to focusing on one characteristic feature of an individual or system for study or analysis.

Normal Curve

A symmetrical, bell-shaped curve that describes the distribution of many types of data; most scores fall near the mean (about 68 percent fall within one standard deviation of it) and fewer and fewer near the extremes. Also called a normal distribution.

Standardization

Defining uniform testing procedures and meaningful scores by comparison with the performance of a pretested group.