A Block of Mass M = 9 $0.50 \mathrm {~m} / \mathrm { s }$

question 7

Multiple Choice

A block of mass m = 9.0 kg and speed V and is behind a block of mass M = 27 kg and speed of $0.50 \mathrm {~m} / \mathrm { s }$ as shown int the figure.The surface is frictionless,and the blocks suddenly collide and couple.After the collision,the blocks have a common speed of 0.90 m/s.How much kinetic energy of the blocks is lost due to the collision?

• A)8.6 J
• B)2.0 J
• C)4.6 J
• D)11 J
• E)31 J

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Definitions:

Long-Run Aggregate Supply

The total output of goods and services that an economy can produce when it is using all of its resources efficiently and at full employment.

Vertical

In economics, this term typically refers to a market structure where companies provide different, but related, products or services at various stages of production.

Money Supply

The total financial resources in an economy at a particular time, made up of cash, coins, and the holdings in checking and savings accounts.

Inflation

An increase in the average cost of goods and services, resulting in a drop in the value of purchasing power.