A 5-Kg Projectile Is Fired Over Level Ground with a Velocity

question 27

Multiple Choice

A 5-kg projectile is fired over level ground with a velocity of 200 m/s at an angle of 25 ° above the horizontal. Just before it hits the ground its speed is 150 m/s. Over the entire trip the change in the thermal energy of the projectile and air is:

• A) +19,000 J
• B) -19,000 J
• C) +44,000 J
• D) -44,000 J
• E) 0

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Definitions:

Population Parameter

A numerical value that represents a characteristic of an entire population, such as the population mean or standard deviation.

Bootstrap Method

A method for estimating population statistics by repeatedly sampling from a dataset with replacement.

Resamples

The act of taking repeated samples from the same dataset, typically used in bootstrapping or permutation tests to generate a sampling distribution.

Standard Deviation

This metric calculates the dispersion of a dataset relative to its mean, demonstrating how spread out the numbers are.