A 50-N Force on Is the Only Force a 2-Kg

question 40

Multiple Choice

A 50-N force on is the only force a 2-kg crate that starts from rest. At the instant the object has gone 2 m the rate at which the force is doing work is:

• A) 2.5 W
• B) 25 W
• C) 75 W
• D) 100 W
• E) 1000 W

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Definitions:

Variable Manipulation

The process of altering one or more variables in an experiment to determine its effects on a dependent variable.

Controlled Conditions

Specific parameters maintained during scientific research or experiments to ensure the validity and reliability of the results.

Independent Variable

In research and experimentation, the variable that is manipulated or changed to assess its effect on a dependent variable.

Extraneous Variable

Any variable that you are not intentionally studying in your experiment or test that could affect the outcome of your research.