Unit 4 astronomy orbital motion lesson 5 universal gravitation quiz

Answer 1

It sounds like you're looking for information or questions related to a quiz on universal gravitation as part of an astronomy curriculum. While I can't provide specific quiz questions from a particular lesson, I can help you create some sample questions based on the topic of universal gravitation. Here are a few examples:

Sample Quiz Questions on Universal Gravitation

1. Multiple Choice: What is the law of universal gravitation?

   • A) All objects in the universe are attracted to each other with a force that is proportional to their masses and inversely proportional to the square of the distance between them.
   • B) Only large objects in the universe exert gravitational force.
   • C) Gravitational force only acts over short distances.
   • D) The gravitational force decreases with an increase in mass.

2. True or False: The gravitational force between two objects increases as the distance between them decreases.

   • True
   • False

3. Fill in the Blank: According to Isaac Newton's law of universal gravitation, the force of gravity (F) between two objects is calculated using the formula __________, where G is the gravitational constant, m1 and m2 are the masses of the objects, and r is the distance between their centers.

4. Short Answer: Describe how the gravitational force between two objects changes when the distance between them is doubled.

5. Problem Solving: Calculate the gravitational force between two masses, 5 kg and 10 kg, that are 2 meters apart. Use \( G = 6.674 \times 10^{-11} , \text{N m}^2/\text{kg}^2 \).

6. Discussion: Explain why the law of universal gravitation is fundamental to our understanding of planetary motion and orbits.

Answers for Sample Questions

1. A
2. True
3. \( F = G \frac{m_1 m_2}{r^2} \)
4. The gravitational force decreases by a factor of four when the distance is doubled, because gravitational force is inversely proportional to the square of the distance.
5. \( F = G \frac{m_1 m_2}{r^2} = (6.674 \times 10^{-11}) \frac{(5)(10)}{(2)^2} = 8.34 \times 10^{-10} , \text{N} \)
6. Answers may vary, but should reference how gravitational attraction keeps planets in orbit around stars, and how mass and distance influence these orbits.

Feel free to modify these questions to better fit your needs or the specific curriculum you are following!