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Science
9th -
12thgrade
universal law of gravitation and escape velocity
15 questions
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- 1. Multiple Choice
According to the Newton’s Universal Law of Gravitation, the force of gravity between two objects is directly proportional to
The distance between the objects.
The product of the masses of the objects.
The gravitational constant.
The square of the distance between the objects.
- 2. Multiple Choice
According to the Newton’s Universal Law of Gravitation, the force of gravity between two objects is inversely proportional to
the distance between the objects.
the product of the masses of the objects
the gravitational constant
the square of the distance between the objects
- 3. Multiple Choice
The force of gravity on a 50 kg woman is 500 N. The woman also exerts a gravitational force on the Earth. How large a force is this?
0 N
500 N
245 N
980 N
- 4. Multiple Choice
Which of the following factors affects the escape velocity of an object from the surface of the earth?
Mass of earth
Gravity of satellite
Acceleration due to gravity
Mass of object
- 5. Multiple Choice
Calculate the gravitational force between two objects when they are 0.750m apart. Each object has a mass of 5.00kg.
2.96x10-7N
3.00x10-6N
2.22x10-9N
2.23x10-8N
- 6. Multiple Choice
What is the gravitational force between two identical 50,000 kg asteroids whose centers of mass are separated by 1000 m?
2500 N
3.3 x 10-12 N
1.67 x 10-4 N
1.67 x 10-7 N
- 7. Multiple Choice
Two spherical objects have masses of 8000 kg and 1500 kg. Their centers are separated by a distance of 1.5 m. Find the gravitational attraction between them
5.4 X 10-4 N
1.2 X 107 N
3.6 X 10-4 N
5.33 N
- 8. Multiple ChoiceComplete the following statement: The farther away two planets are the _______ the gravitational force between them.moresamedosen't matterless
- 9. Multiple Choice
Which configuration will result in the greatest gravitational force?
small masses far apart
large masses far apart
small masses close together
large masses close together
- 10. Multiple Choice
Newton's Third Law of Motion states that forces
always act in equal or opposite pairs
equal mass times velocity
act on an object to move it or to stop it.
- 11. Multiple Choice
What direction does the ground push on you when you jump?
The ground doesn't push on you.
down
up
- 12. Multiple Choice
If you push a skateboard with a force of 8 N and your mass is 80 kg, what is the force that the skateboard exerts on you?
75 N
8 N
7N
10 N
- 13. Multiple Choice
The escape velocity of a sphere of mass m from earth having mass M and radius R is given by
- 14. Multiple Choice
The escape velocity from the earth is about 11 km/second. The escape velocity from a planet having twice the radius and the same mean density as the earth, is
11km/s
5.6km/s
22km/s
55.6km/s
- 15. Multiple ChoiceCompared to that of the Earth, the escape velocity you need to take off from the moon is ___a lot moreslightly moreslightly lessa lot less
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