A Boy of Mass 55 Kg Runs on a Line

question 35

Multiple Choice

A boy of mass 55 kg runs on a line tangent to the edge of a merry-go-round,whose mass is 125 kg and radius 1.2 m.He jumps onto the merry-go-round,and the angular speed of the merry-go-round becomes 2.2 radians per second.How fast was the boy running before he landed on the merry-go-round?

• A)5.6 m/s
• B)6.8 m/s
• C)8.6 m/s
• D)3.2 m/s

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Definitions:

Central Bank

An institution that manages a country's currency, money supply, and interest rates. Central banks also oversee the commercial banking system of their respective countries.

Sacrifice Ratio

The sacrifice ratio measures the cost of reducing inflation in terms of the percentage of GDP lost per each percentage point decrease in inflation.

Volcker Disinflation

A period during the early 1980s when the Federal Reserve, led by Chairman Paul Volcker, raised interest rates to historically high levels in order to combat high inflation.

Estimates

Approximations or educated guesses based on current trends and data.