If a Projectile Hits a Stationary Target, and the Projectile

question 86

Multiple Choice

If a projectile hits a stationary target, and the projectile stops while the target moves at the same speed as the incoming speed of the projectile,

• A)the mass of the projectile is much less than the mass of the target.
• B)the mass of the projectile is equal to the mass of the target.
• C)the mass of the projectile is much greater than the mass of the target.
• D)nothing can be said about the masses of the projectile and target without further information.
• E)this is an unphysical situation and will not actually happen.

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Definitions:

Standard Error

The standard deviation of the sampling distribution of a statistic, most commonly the mean; it is used to estimate the accuracy of a sample mean compared to the population mean.

Confidence Interval

A range of values, derived from sample statistics, that is believed to contain the true value of a population parameter with a certain level of confidence.

Mean

Refers to the arithmetic average of a dataset, computed as the sum of all the numerical values divided by the count of values in the dataset.

Standard Error

The standard deviation of the sampling distribution of a statistic, often the mean, representing the accuracy with which a sample approximates a population.