Q2 - LEARNING ACTIVITY SHEET (LAS) 2 SHS - General Physics 1: Name: Section: Directions: Read each question carefully 3. Which of the planets has a greater and choose the letter of the best answer. gravitational field than the Earth? Encircle the letter that corresponds to A. Jupiter C. Uranus your answer. B. Mars D. Venus 1, Which of the following statements can you infer from the equation of the Law 4. Which of the following are advantages of gravitation? of Gravitation F = G-? 1. It keeps us bound to the earth. 1. If the distance r is doubled, the Il. It makes the moon go around the force F, is also doubled. earth. II. If the distance r is doubled, the Ill. It makes the earth move around force F, is only one- fourth as great. the sun. Ill. The gravitational force F, between IV. It makes the lifting process of two particles m, and m, decreases heavy objects difficult. with increasing distance r. A. All except I C. All except III IV. The gravitational force F, between B. All except II D. All except IV two particles m, and m, increases with increasing distance r. 5. How much gravitational potential A. I and Il C. I and IV energy does a 5.0 kg block have if it is B. II and ill D. Ill and IV lifted to a height of 10 m? A. 0.49 J C. 49 J 2. The mass m, of one of the small B. 4.9J D. 490 J spheres of a Cavendish balance is 0.0100 kg, the mass m, of the 6. How high must an object of mass 10.0 nearest large sphere is 0.500 kg, and kg be lifted to gain a gravitational the center-to-center distance potential energy of 980 J? between them is 0.0500 m. Which of A. 5m C. 15 m following mathematical B. 10 m D. 20 m the expressions are TRUE about the magnitude of the gravitational force 7. A satellite wishes to orbit the earth at a and acceleration of each sphere height of 100 km above the surface of relative to an inertial system? (Note: the earth. What is the satellite's orbital G= 6.67 x 10-1' N.m?/kg?) speed? A. Both have F, = 1. 33 x 10 N and A. 0.785 x 10' m/s B. 7.85 x 10' m/s a , =a, B. Both have F = 1. 33 x-10 N and C. 78.5 x 10* m/s D. 785 x 10* m/s a, > a2 C. Both have F > 1. 33 x 10' N and 8. The period of the moon is a, =a, D. Both have F > 1. 33 x 10 N and approximately 27.2 days (2.35 x 105 s). What is the radius of the moon's a, > a, orbit? (Note: Use the circular orbitQ2-LEARNING ACTIVITY SHEET (LAS) 2 SHS - General Physics 1 Name: Section: equation T= 2TirW /VGm, to solve for r, where G= 6.67 x 10-"' N.m'/kg' and m,= 5.97 x 10* kg) A. 0.382 x 10 m B. 3.82 x 10" m C. 38.2 x 10" m D. 382 x 10# m 9. Which of the following laws of Kepler's Law of Planetary Motion explains that a planet travels faster when it is near the sun? A. Law of orbits B. Law of areas C. Law of periods D. Law of gravitation 10. Kepler's third law states that the squares of the orbital periods of the planets are directly proportional to the cubes of the semi- major axes of their orbits. Which of the following statements supports this law? A. Every planet orbits the sun in the same amount of time. B. Every planet orbits the sun at the same distance from the sun. C. It takes less time to orbit the sun if the planet is far from the sun. D. It takes more time to orbit the sun if the planet is far from the sun. END OF GENERAL PHYSICS 1