A Car of Mass 3 $\times$ 10³ Kg Traveling at a Speed of 20 Is

question 39

Multiple Choice

A car of mass 3.0 $\times$ 10³ kg traveling at a speed of 20 is passing a truck of mass
7.5 $\times$ 10³ kg traveling at a speed of 16 in the same direction. What is the speed of the center of mass of this system?

• A) 16
• B) 17
• C) 18
• D) 19
• E) 20

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Definitions:

Sample Mean

The average of all the observations in a sample, used as an estimate of the population mean.

Central Limit Theorem

A statistical theory stating that, given a sufficiently large sample size from a population with a finite level of variance, the mean of all samples will be approximately equal to the mean of the population, with the samples approximating a normal distribution.

Statistical Inference

The process of drawing conclusions about population properties based on a sample taken from the population.

Sample Proportion

The fraction or percentage of items in a sample that exhibit a particular trait or characteristic.