A Constant Horizontal Pull Acts on a Sled on a Horizontal

question 37

Multiple Choice

A constant horizontal pull acts on a sled on a horizontal frictionless ice pond. The sled starts from rest. When the pull acts over a distance x, the sled acquires a speed v and a kinetic energy K. If the same pull instead acts over twice this distance:

• A) The sled's speed will be 2v and its kinetic energy will be 2K.
• B) The sled's speed will be 2v and its kinetic energy will be K .
• C) The sled's speed will be v and its kinetic energy will be 2K.
• D) The sled's speed will be v and its kinetic energy will be K .
• E) The sled's speed will be 4v and its kinetic energy will be 2K.

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Definitions:

Color Labels

Descriptive or identifying words assigned to colors, often influencing perception and communication of colors.

External Validity

The degree to which a study’s participants, stimuli, and procedures adequately reflect the world as it actually is.

Internal Reliability

A measure of consistency within a test, indicating how closely related a set of items are as a group, often used in psychometrics and research.

Momentary Effects

Momentary effects are short-term impacts that last for a brief period before dissipating.