The Equation Below Is the Solution to a Physics Problem

question 36

Multiple Choice

The equation below is the solution to a physics problem: $$\frac { 1 } { 2 } ( 2.30 \mathrm {~kg} ) \left( 3.90 \frac { \mathrm { m } } { \mathrm { s } } \right) ^ { 2 } = \frac { 1 } { 2 } ( 2.30 \mathrm {~kg} ) \left( 2.33 \frac { \mathrm { m } } { \mathrm { s } } \right) ^ { 2 } + ( 2.30 \mathrm {~kg} ) \left( 9.80 \frac { \mathrm { m } } { \mathrm { s } ^ { 2 } } \right) ( 1.00 \mathrm {~m} ) \cos \left( 60 ^ { \circ } \right)$$ . The most likely physical situation it describes is

• A)a 2.30 kg cart rolling up a 30\(\degree\) incline.
• B)a 2.30 kg cart rolling down a 30\(\degree\) incline.
• C)a 2.30 kg cart rolling up a 60\(\degree\) incline.
• D)a 2.30 kg cart rolling down a 60\(\degree\) incline.
• E)a 2.30 kg cart rolling down a 90\(\degree\) incline.

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Definitions:

Commodity Money

Money that has intrinsic value, such as gold or silver, which can serve as a medium of exchange, a unit of account, and a store of value.

Fractional Reserve Banking

A financial system where just a small portion of the deposits at a bank is supported by real cash present and accessible for withdrawal.

Fiat Money

Fiat money is currency that a government has declared to be legal tender, despite it not being backed by a physical commodity.

Precious Metal

Rare, naturally occurring metallic elements of high economic value, typically used for currency, jewelry, and other arts because of their rarity, durability, and aesthetic qualities.