DOC PREVIEW
UT Arlington PHYS 1443 - Term 2 Exercise Problems

This preview shows page 1-2-3-4 out of 13 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 13 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 13 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 13 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 13 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 13 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

Phys1443-003, Fall04,Term 2 Exercise Problems 1Page 1 1. Two objects attract each other gravitationally with a force of 2.5 ð 10-10 N when they are 0.25 m apart. It their total mass is 4.0 kg, their individual masses are: a. 1.5 and 2.5 kg b. each 2 kg c. 0.5 and 3.5 kg d. need more information 2. Two objects have mass m and 2m respectively and are separated by a distance d. At what distance from the lighter object along the line joining the two objects would the net gravitational force on a third object be zero? a. 0.25 d b. 0.41 d c.0.5 d d. 0.81 d 3. Three 5 kg masses sit at the vertices of an equilateral triangle of side 1 m. The magnitude of the gravitational force on any of the masses due to the other two is a. 1.2 ð 10-11 N b. 2.5 ð 10-10 N c. 2.9 ð 10-9 N d. 3.4 ð 10-8 N 4. An object of mass 5 kg weighs 49 N at the surface of the Earth. At an altitude equal to twice the Earth's radius its weight is a. 12.3 N b. 24.5 N c.49 N d. 98 N 5. The gravitational acceleration g at the surface of two hypothetical planets has the same value, but planet #1 has twice the radius of planet #2. The ratio of the mass of planet #1 to that of #2 is a. 2:1 b. 1:2 c.4:1 d. 1:4 6. The period of a satellite orbiting the Earth 2000 km above the surface is a. 3.5 ð 103 s b. 7.6 ð 103 s c. 8.5 ð 103 s d. 9.0 ð 103 s 7. A satellite orbits the Earth with a speed of 4500 m/s. Its period is a. 1.5 ð 103 s b. 2.1 ð 104 s c. 2.7 ð 104 s d. 3.5 ð 104 s 8. Which of the following statements is true regarding satellites in circular orbits about a planet? a. The period depends on the mass of the satellite b. The period is independent of the radius of the orbit c. The speed of the satellite can change as it maintains its circular orbit d. The period increases with increasing orbital radius 9. A satellite of mass 5000 kg orbits the Earth (mass = 6.0 ð 1024 kg) and has a period of 6000 s. The magnitude of the Earth's gravitational force on the satellite is a. 7.9 ð 10-3 N b. 7.9 ð 10-2 N c. 7.9 N d. 7.9 ð 103 N 10. The period of a satellite orbiting just above the Earth's surface is a. 2500 s b. 5040 s c. 7500 s d. 86,400 sPhys1443-003, Fall04,Term 2 Exercise Problems 2 11. Two satellites are in circular orbits about the Earth, with satellite 2 in an orbit of larger radius than satellite 1. Which satellite has the longer period? a. satellite 1 b. satellite 2 c. need to know the masses of the satellites 12. Satellite #1 has three times the mass of satellite #2. Both are in circular orbits of the same radius about Earth. The ratio of the speed of satellite #1 to the speed of satellite #2 is a. 3:1 b. 1:3 c.2:1 d. 1:1 13. The speed of Halley's comet at its point of closest approach to the Sun is a. the same as its speed throughout its orbit b. greater than its value at any other point in its orbit c. less than its value at any other point in its orbit 14. Four equal masses are located at the corners of a square. The direction of the gravitational field at the midpoint of the lower side of the square is a. up b. down c.left d. right 15. The gravitational field at the center of the Earth has magnitude a. zero N/kg b. 6.67 ð 10-11 N/kg c. 9.8 N/kg d. infinity 16. If the inertial mass and the gravitational mass were not equal, which of the following principles would change? a. the inverse-square law of gravitation b. Kepler's Third Law c. Newton's Second Law A satellite of mass 5000 kg orbits the Earth (mass = 6.0 ð 1024 kg) and has a period of 6000 s. 17. In the above problem the altitude of the satellite above the Earth's surface is a. 7 ð 103 m b. 7 ð 105 m c.4 ð 106 m d. 5 ð 108 m Two objects attract each other gravitationally with a force of 2.5 ð 10-10 N when they are 0.25 m apart. 18. In the above problem if the two objects experience no forces other than their mutual gravitational attraction then their resulting accelerations are a. equal b. different Two satellites are in circular orbits about the Earth, with satellite 2 in an orbit of larger radius than satellite 1. 19. In the above problem which satellite has the larger speed? a. satellite 1 b. satellite 2 c. need to know the masses of the satellites The period of a satellite orbiting just above the Earth's surface is 5040 s. 20. The mass of the satellite in the above problem isPhys1443-003, Fall04,Term 2 Exercise Problems 3 a. 5000 kg b. 9.8 kg c. 2.5 ð 105 kg d. need more information 21. The speed of the satellite in the above problem is a. 3070 m/s b. 7780 m/s c.7900 m/s d. 8500 m/s Three 5 kg masses sit at the vertices of an equilateral triangle of side 1 m. 22. In the above example the force points a. away from the center of the triangle b. toward the center of the triangle c. along a line joining two of the masses Four equal masses are located at the corners of a square. 23. In the above problem if each mass is 1 kg and the square has side 0.5 m the strength of the gravitational field at the midpoint of a side is a. 1.6 ð 10-9 N/kg b. 2.5 ð 10-9 N/kg c. 3.8 ð 10-9 N/kg d. 3.8 ð 10-10 N/kg 24. If you lift a box of mass 5 kg straight up at constant speed through a displacement of 1 m, the total work done on the box is a. zero J b. 49 J c.-49 J d. 25 J 25. The angle between a force F and a displacement d is 125ø. The work done by the force is a. zero b. positive c. negative d. the sign depends on the magnitudes of F and d. 26. A particle moves in uniform circular motion. The work done on it by the centripetal force is a. zero b. positive c. negative 27. A box of mass 5 kg is accelerated by a force across the floor at a rate of 2 m/s2 for 10 s. The work done by the force is a. 50 J b. 100 J c.1000 J d. 1500 J 28. A box of mass 10 kg slides down a plane inclined at an angle of 30ø with the horizontal. The coefficient of kinetic friction between the box and the incline is 0.2. The length of the incline is 5 m. …


View Full Document

UT Arlington PHYS 1443 - Term 2 Exercise Problems

Documents in this Course
Physics

Physics

30 pages

Physics

Physics

25 pages

Physics

Physics

25 pages

Waves

Waves

17 pages

Physics

Physics

16 pages

Friction

Friction

15 pages

Load more
Download Term 2 Exercise Problems
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Term 2 Exercise Problems and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Term 2 Exercise Problems 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?