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Duplicate of Relativity and Gravity Flashcards | StudBud
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Duplicate of Relativity and Gravity
Duplicate of Relativity and Gravity
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1
All laws of physics are the same in systems which ___according the special theory of relativity
Move at a constant velocity and are inertial
Rotate clockwise
Agree with newtonian physics
Move with acceleration
2
What is the force of gravity in earth?
9.8km/h
9.0m/s
10 m/h
9.8m/s
3
What is the second postulate?
Time is constant
The speed of light is constant
The laws of physics are the same in all inertial systems
The laws of physics are the same in all non-inertial systems
4
question in image sorry
4 m/s^2
8.0 m/s^2
6.8 m/s^2
5.45 m/s^2
5
what is the distance between the centers of these two bodies when-
11m
2m
1m
.05km
6
what is the gravitational force?
8.23x 10^ -8 N
8.23x10^-11 N
7.41x10^-9 N
8.23x10^-12 N
7
Calculate m2 when m1 is 12 kg with a radius of 3m.
twelve
8kg
13kg
not enough info
8
The asteroid Vesta has a mass of 7 x 10^20kg and a radius of 500km. What is g on the surface?
0.2m/s^2
0.2 m/s
2 m/s
2 m/s^2
9
You are 2r away from the earths center, g is:
g/4
g/2
g/3
g/5
10
Which of the following are true about the special theory of relativity?
All events are simultaneous to an observer
Thelaws of phys. arethe same inall inertial reference frames
Time does not exist
The mass of an object decreases as it reaches infinity
11
Define the equation g=Fg/m
The strength of gravitational force on one kg of mass
The strength of the gravity exerted by the moon on earth
The strength exerted by gravity on any masss
The effectiveness of gravitation on one kg of mass
12
The force of gravity is…
nversely proportional to the square dist. between the masses
Directly proportional to the mass of an object
Both a & c
Inversely proportional to the distance between the masses
13
What is the universal gravitational constant?
6.33x10^-8
9.07x10^-8
6.67x10^-11
12.56 x10^-11
14
The force of gravity is…
Directly proportional to the mass of an object
Both blue and yellow
Directly proportional to the distance between the masses
Inversely proportional to the distance between the masses
15
What is the purpose of the Michelson-Morley Experiment?
To prove the existence of ether in the universe
To prove that the speed of light is constant
Both a and b
To prove that ether is at absolute rest
16
Complete the sentence, Gravity is stronger:
2 radius away from the earth’s center
At the equator
at the center of the earth
Under the crushing expectations of society
17
What are the forces of the universe?
Gravitational Force, Electronegativity Force
Gravitational F, Electric F, Strong Nuclear F Weak Nuclear F
The Force
Gravitational Force, Electric Force, Nuclear Force
18
What is a system of reference?
Any 3D system with an x, y, and z axis
Any 4D system with a w, x, y, and z axis
Any system proportional to another system
Any 2D system with an x and y axis
19
what is the equation for little g?
g = Gm/r^2
g = Gm/r
g = gm1m2/r^2
G = gm/r
20
True or False, gravitational force is the weakest fundamental force in nature
False
True
21
What is gravity?
Imaginary
A constant
A force
A unit
22
Calculate the gravitational field strength of a planet 2x the mass and ⅓ the earth’s radius
203.8 N/kg
164.3 N/kg
176.4 N/kg
308.1 N/kg
23
Calculate m1 when:
1.81 x 10 ^ 11 N
1.81 x 10 ^ 12 kg
twelve
2.82 x 10 ^ 12 kg
24
What is the equation for Gravity on Earth?
Fg=G(M*m/R^2)
Fg=M*m/R^2
Fg=G(M/R)
Fg=G(M*m/R)
25
Calculate the gravitational field strength of a planet 2x the mass and ½ the earth’s radius
9.8 kg/N
4.53 N/kg
19.9 N/kg
9.8 N/kg
26
What is the universal gravitational constant?
6.67x10^-11
6.33x10^-8
9.07x10^-8
12.56 x10^-11
27
The force of gravity is…
Very strong
So weak we can’t even feel it
Non-existent
In your imagination
