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- 1. Multiple Choice
The discovery of “Universal Gravitation” is associated with:
Robert Hook
Isaac Newton
James Joule
Max Plank
Christian Huygens
- 2. Multiple Choice
Two objects with equal masses of 1 kg each are separated by a distance of 1 m. The gravitational force between the objects is:
Slightly less than G
Slightly greater that G
Equal to G
Half as much of G
- 3. Multiple Choice
Two objects, one with a mass of m and one with a mass of 4m are attracted to each other by a gravitational force. If the force on 4m is F, what is the force on mass m in terms of F?
16F
4F
¼ F
F
- 4. Multiple Choice
An apple hangs on a tree on the Earth. Which of the following statements is correct?
The force on the apple is greater than the force on the Earth because the Earth is more massive.
The forces on the apple and the Earth are zero because they are not touching each other.
The force on the apple is less than the force on the Earth because the tree is supporting the apple.
The forces on the apple and Earth are equal.
- 5. Multiple Choice
Two objects are attracted to each other by a gravitational force F. If one mass is doubled and the other is tripled without changing the distance, what is the new gravitational force between the objects in terms of F?
6 F
9 F
1/6 F
1/9 F
- 6. Multiple Choice
Two objects are attracted to each other by a gravitational force F. If the distance between the objects is doubled, what is the new gravitational force between the objects in terms of F?
4 F
16 F
1/4 F
1/9 F
- 7. Multiple Choice
Two objects are attracted to each other by a gravitational force F. If each mass is tripled and the distance between the objects is cut in half, what is the new gravitational force between the objects in terms of F?
24 F
1/24 F
16 F
36 F
- 8. Multiple Choice
An object with a mass of 48 kg measured on Earth is taken to the Moon. What is the mass of the object on the Moon’s surface if the acceleration due to gravity on Moon is one-sixth of that on Earth?
8 kg
48 kg
288 kg
480 kg
- 9. Multiple Choice
An object with a mass of 48 kg measured on Earth is taken to the Moon. What is the weight of the object on the Moon’s surface if the acceleration due to gravity on Moon is one-sixth of that on Earth?
80 N
48 N
288 N
8 N
- 10. Multiple Choice
A rocket moves away from the surface of Earth. As the distance r from the center of the planet increases, what happens to the force of gravity on the rocket?
The force doesn’t change
The force increases directly proportional to 𝑟2
The force decreases inversely proportional to 1/𝑟2
The force becomes zero after the rocket loses the contact with Earth
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