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- 1. Multiple Choice
The amount of attraction between two objects which are not in contact with each other is known as the _________.
Normal force
Gravitational force
Magnetic force
Electrical force
- 2. Multiple Choice
What is the proper setup of the gravitational force formula?
Fg= Gm2/r
F=ma
Fg= Gr2/(m1+m2)
Fg= G (m1m2)/r2
- 3. Multiple Choice
What effect does increasing the distance between the two objects do to the gravitational force?
The distance between two objects has no effect on the gravitational force
It increases
It stays the same
It decreases
- 4. Multiple Choice
When do gravitational forces exist between two objects?
They only exist between microscopic objects.
They are always present between any two objects.
Gravitational forces only act on objects falling on Earth.
They only exist for objects in space.
- 5. Multiple Choice
Calculate the gravitational force between a 15-kg chinchilla and a 65-kg dog which are separated by 0.30 m.
Fg = 3.7*10-8 N
Fg = 1.3*1012 N
Fg = 1.1*105 N
Fg = 7.2*10-7 N
- 6. Multiple Choice
What would the gravitational force be between the Sun and Mars if they were 2.3*1011 m apart? The masses for the Sun and Jupiter are 1.99*1030 kg and 6.42*1023kg, respectively.
Fg = 3.8*1015 N
Fg = 2.8*10-42 N
Fg = 1.6*1021 N
Fg = 4.6*10-75 N
- 7. Multiple Choice
What does the variable G in the gravitational force equation represent?
Universal gravitational constant
Combined masses of the two objects
Gravitational force
Dielectric constant
- 8. Multiple Choice
Which of the following changes would increase the gravitational force between two objects?
Increase G
Increase the mass
Increase r
Decrease G
- 9. Multiple Choice
True or False: The gravitational force each tennis ball acts on the other is the same.
True
False
- 10. Multiple Choice
When calculating the r value for gravitational force, where do we measure between two objects?
The sum of their diameters
The center of their masses
The furthest reaches of their orbits
The tips of one of their poles
- 11. Multiple Choice
Why do we not feel a gravitational attraction to the objects around us?
The masses are too small for the Fg value to be noticeable
Gravitational forces are not found on Earth
The radius between us and the objects is too great
Electrical forces overpower the gravitational forces
- 12. Multiple Choice
What is the gravitational force between a 140 kg tree and a 798 kg Lotus Elise Sprint that are 15 m away?
6.6*10-7 N
4.8*104 N
3.3*10-8 N
7.4*1012 N
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