New Zealand Scholarship Physics Practice Questions - New Zealand Scholarship Physics Assessment (NZQA Standard 93103) Exam

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A satellite moves in a stable circular orbit around Earth at an orbital distance r from Earth's center. If the satellite's orbital radius is quadrupled to 4r, how does its orbital speed v change?

The orbital speed is halved (v_new = 0.5 * v). The orbital speed quadruples. The orbital speed is reduced to one-fourth. The orbital speed doubles.

Correct Answer:

The orbital speed is halved (v_new = 0.5 * v).

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