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Question 1
Two point masses of m1 = 500 kg and m2 = 800 kg are separated by a distance of r = 2.0 m. Using Newton's law of universal gravitation with G = 6.674 x 10^-11 N*m^2/kg^2, what is the magnitude of the gravitational force between them?
Correct Answer:
6.67 x 10^-6 N
Question 2
Planet A orbits a star at a mean orbital radius rA, with an orbital period of TA = 8.0 years. Planet B orbits the same star at a mean orbital radius rB = 4 * rA. According to Kepler's Third Law (T^2 / r^3 = constant), what is the orbital period of Planet B?
Correct Answer:
64 years
Question 3
What is the gravitational field strength g at an altitude h = RE above the surface of the Earth, where RE is the Earth's radius and g0 = 9.80 m/s^2 is the surface gravitational acceleration?
Correct Answer:
2.45 m/s^2
Question 4
Which statement correctly describes the sign and physical interpretation of gravitational potential energy Ep = -G * M * m / r for a two-body bound system?
Correct Answer:
Ep is always negative because energy must be added to the system to separate the masses to infinity where Ep = 0.
Question 5
A satellite of mass m = 1000 kg orbits Earth in a circular path at distance r = 4 * RE from Earth's center. Given Earth's surface gravity g0 = 9.80 m/s^2 and RE = 6.37 x 10^6 m, what is the satellite's circular orbital speed?
Correct Answer:
3.95 km/s
Question 1
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Prepare with the Extremadura PAU Physics Practice Questions - Extremadura PAU Physics (Física) Exam practice quiz. This question bank includes 100 questions covering field, magnetic, speed, distance, and radius. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Extremadura PAU Physics Practice Questions - Extremadura PAU Physics (Física) Exam

This practice set contains 100 questions from the matching question bank and focuses on field, magnetic, speed, distance, and radius. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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