a projectile launched from Earth reaching a height equal to Earth's radius before returning to land. (Neglect air resistance.) Compare the gravitational potential energy when the particle is launched to the potential energy when the particle is at the peak of its trajectory.
A.
\(U_{\text {peak }}=U_{\text {launch }}\) because of conservation of energy.
B.
\(\left|U_{\text {peak }}\right|> \left|U_{\text {launch }}\right|\) and \(U_{\text {peak }}> 0\)
C.
\(\left|U_{\text {peak }}\right|< \left|U_{\text {launch }}\right|\) and \(U_{\text {peak }}< 0\)
D.
\(\left|U_{\text {peak }}\right|< \left|U_{\text {launch }}\right|\) and \(U_{\text {peak }}> 0\)
E.
\(\left|U_{\text {peak }}\right|> \left|U_{\text {launch }}\right|\) and \(U_{\text {peak }}< 0\)
Exam No：AP Physics C Practice Test Year：2024 Question No：11
Answer:
C
Knowledge points:
3.2 Force and Potential Energy
7.1 Gravitational Forces
Solution:
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