High School

A 50.0 kg shell is fired from a cannon on Earth's surface to a maximum height of 400 m. What is the potential energy?

A. 196,000 J
B. 170,000 J
C. 185,000 J
D. 190,000 J

Answer :

[tex]ep = mgh[/tex]

[tex]ep = (50.0)(9.81)(400)[/tex]

[tex]ep = 196200 \: j[/tex]

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I also calculated it with 9.8 as the gravity and the answer was 196000 J

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