A 500-Kg Sack of Coal Is Dropped on a 2000-Kg

question 20

Multiple Choice

A 500-kg sack of coal is dropped on a 2000-kg railroad flatcar which was initially moving at 3 m/s as shown.After the sack rests on the flatcar, the speed of the flatcar is:

• A)0.6 m/s
• B)1.2 m/s
• C)1.8 m/s
• D)2.4 m/s
• E)3.6 m/s

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Definitions:

STRIPS

Separate Trading of Registered Interest and Principal Securities, a type of U.S. government security that allows the separate trading of interest and principal components.

Treasury Notes

Intermediate-term U.S. government debt security with a maturity of 1 to 10 years and pays interest every six months.

Maturity at Issue

The predetermined date when a financial instrument, such as a bond, will come due and the principal is to be paid back to investors.

Default Risk

The potential risk that an issuer of a bond or other debt security will be unable to make principal and interest payments when due.