2_Q2-Physics1
Page 1: Overview
General Physics 1: Focuses on Newton’s Law of Universal Gravitation and Kepler’s Law of Planetary Motion.
Target Audience: Senior High School students in STEM.
Page 2: Legal Information
Copyright: Under Republic Act 8293, section 176, work of the Government of the Philippines is publicly accessible with conditions for commercial use.
Module Credits: Developed by various educational professionals.
Page 3: Objectives of the Module
Key Concepts:
Newton's Universal Law of Gravitation: Governs how gravity influences celestial objects.
Kepler’s Laws: Allow prediction of planetary orbital periods.
Expected Outcomes:
Solve problems using Newton’s Law and Kepler’s Laws.
Conduct simple experiments related to gravity.
Questions for Assessment:
Multiple choice questions assessing understanding of gravity and Kepler’s Laws.
Page 4: Continued Assessment
Assessment Questions:
Focus on gravitational force, weight, and planetary motion.
Key Concepts in Kepler's Laws:
Gravitational attraction increases as objects get closer.
Kepler's First Law recognizes elliptical orbits.
Page 5: Activity Instructions
Activity: Create a crossword puzzle including terms related to Newton and Kepler.
Page 6: Background on Isaac Newton and Johannes Kepler
Isaac Newton:
Birth: January 4, 1643; notable for work on gravity.
Contributions to optics and mechanics, laid foundation for Universal Law of Gravitation.
Johannes Kepler:
Birth: December 27, 1571; discovered three laws of planetary motion after observing planetary orbits.
Page 7: Newton’s Law of Universal Gravitation
Gravitational Force:
Acts on planets maintaining their orbits around the sun.
Key Features of the Law:
Gravitational force always exists between two particles.
Force decreases with the square of distance.
Directly proportional to the product of their masses.
Equation:
F = G * (m1 * m2) / r^2
Where G is the gravitational constant (6.67 x 10^-11 N m²/kg²).
Page 8: Calculation Examples
Weight Calculation on Earth:
Weight (W) = mass (m) * gravitational acceleration (g = 9.8 m/s²).
Sample Problem:
Calculate gravitational force using given masses and distance.
Page 9: Kepler’s Laws Explained
Historical Context:
Geocentric model transitioned to heliocentric model.
Kepler’s First Law:
Planets move in elliptical orbits with the Sun at one focus.
Derived Formulas:
r = √(G * m1 * m2 / F) for calculating distances.
Page 10: Kepler’s Second and Third Laws
Second Law:
A planet sweeps out equal areas in equal time intervals.
Third Law:
The square of a planet's period is proportional to the cube of the semi-major axis of its orbit.
Page 11: Word Problems and Solutions
Problem Solving:
Identify and solve gravitational force problems using outlined laws.
Assess gravitational effects of distance changes on weight.
Page 12: Experiments and Observations
At Home Experiment Suggestions:
Drop different objects and observe gravitational effects.
Water dynamics in a spinning cup experiment.
Page 13: Comprehensive Review Questions
Review Questions: Assess knowledge of gravitation, planetary motion, and historical figures in astronomy.
Page 14: References
Books and online sources to deepen understanding of gravitation and planetary motion.
Notable texts include works by Cutnell and Serway.