Find the PE of a 25-Kg Object 1

question 55

Multiple Choice

Find the PE of a 25-kg object 1.67 m above the surface of the National Mall in Washington,DC.Take the surface of Tiananmen Square to be zero potential.Possibly useful information Beijing elevation: 43 m above sea level.
National Mall elevation: 10 m above sea level
Radius of the Earth: 6.38 * 10⁶ m.
Assume that DC and Beijing are directly opposite each other for this problem.

• A)-8100 J
• B)-7700 J
• C)410 J
• D)3.1 * 10⁹ J

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