A Pair of Identical Balls Are Connected by a Massless

question 34

Multiple Choice

A pair of identical balls are connected by a massless rod and thrown straight up into the air, such that the center of mass of the pair reaches a maximum height of 13.2 m above the point of release. On the way up, when the center of mass is at 6.6 m above to point of release, the velocity of one ball is measured to be 7.7 m/s straight downward. What is the velocity of the other ball at this time? Ignore air resistance.

• A) 30.2 m/s up
• B) 23.8 m/s up
• C) 19.1 m/s up
• D) 15.7 m/s up
• E) 3.7 m/s up

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Definitions:

Little or No Association

A term used to describe a situation where there is minimal or no statistical relationship between two variables.

Moderately Strong Association

A statistical term indicating a considerable but not perfect relationship between two variables.

Linear Association

The relationship between two variables that can be represented accurately using a straight line in a scatterplot.

Positive Association

A relationship between two variables where an increase in one variable is associated with an increase in the other variable.