Tham khảo tài liệu 'physics_test_bank_split_14', khoa học tự nhiên, vật lý phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split Unregistered Version - http 14. To measure the mass of a planet with the same radius as Earth an astronaut drops an object from rest relative to the planet from an altitude of one radius above the surface. When the object hits its speed is 4 times what it would be if the same experiment were carried out for Earth. In units of Earth masses the mass of the planet is A. 2 B. 4 C. 8 D. 16 E. 32 ans D 15. Suppose you have a pendulum clock that keeps correct time on Earth acceleration due to gravity s2 . Without changing the clock you take it to the Moon acceleration due to gravity m s2 . For every hour interval on Earth the Moon clock will record A. h B. 1h C. h D. h E. ans E 16. The mass of an object A. is slightly different at different locations on Earth B. is a vector C. is independent of the acceleration due to gravity D. is the same for all ob jects of the same size and shape E. can be measured directly and accurately on a spring scale ans C 17. An astronaut on the Moon simultaneously drops a feather and a hammer. The fact that they land together shows that A. no gravity forces act on a body in a vacuum B. the acceleration due to gravity on the Moon is less than on Earth C. in the absence of air resistance all bodies at a given location fall with the same acceleration D. the feather has a greater weight on the Moon than on Earth E. G 0 on the Moon ans C 18. The mass of a hypothetical planet is 1 100 that of Earth and its radius is 1 4 that of Earth. If a person weighs 600 N on Earth what would he weigh on this planet A. 24N B. 48N C. 96N D. 192N E. 600 N ans C 196 Chapter 13 GRAVITATION Simpo PDF Merge and Split Unregistered Version - http 19. An object at the surface of Earth at a distance R from the center of Earth weighs 90 N. Its weight at a distance 3R from the center of Earth is A. 10N B. 30N C. 90N D. 270N E. 810N ans A 20. An ob ject is raised from the .
