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Questions and Answers
According to the principle of superposition and the law of vector addition, the resultant gravitational force on (2m) is?
According to the principle of superposition and the law of vector addition, the resultant gravitational force on (2m) is?
- 2Gm^2 in the positive i direction
- 2Gm^2 in the negative j direction
- 2Gm^2 in the negative i direction
- 2Gm^2 in the positive j direction (correct)
Why do we need to add up gravitational forces vectorially for all point masses in an extended object?
Why do we need to add up gravitational forces vectorially for all point masses in an extended object?
- To decrease the overall gravitational force
- Because it simplifies the calculation
- Because the forces are not all in the same direction (correct)
- To increase the overall gravitational force
In what scenario does a hollow spherical shell with uniform density exhibit a gravitational force as if its entire mass is concentrated at the center?
In what scenario does a hollow spherical shell with uniform density exhibit a gravitational force as if its entire mass is concentrated at the center?
- When the point mass is inside the shell
- When the shell has non-uniform density
- When the point mass is outside the shell (correct)
- When the shell is not spherical
What component of gravitational forces from a hollow spherical shell have components along the line joining a point mass to the centre?
What component of gravitational forces from a hollow spherical shell have components along the line joining a point mass to the centre?
In the calculation of gravitational forces between an extended object and a point mass, what method is used?
In the calculation of gravitational forces between an extended object and a point mass, what method is used?
What is the result of adding up all the gravitational forces from point masses in an extended object?
What is the result of adding up all the gravitational forces from point masses in an extended object?
What can we understand qualitatively about the force of attraction due to a hollow spherical shell of uniform density on a point mass situated inside it?
What can we understand qualitatively about the force of attraction due to a hollow spherical shell of uniform density on a point mass situated inside it?
Who first experimentally determined the value of the gravitational constant G?
Who first experimentally determined the value of the gravitational constant G?
What kind of force exists between two spherical balls according to the text?
What kind of force exists between two spherical balls according to the text?
What did Henry Cavendish use to experimentally determine the value of G?
What did Henry Cavendish use to experimentally determine the value of G?
What happens to a suspended wire in Cavendish's experiment as a result of the torque applied by two neighbouring small spheres?
What happens to a suspended wire in Cavendish's experiment as a result of the torque applied by two neighbouring small spheres?
How did Cavendish measure the restoring torque in his experimental setup?
How did Cavendish measure the restoring torque in his experimental setup?
According to Newton's Universal Law of Gravitation, the force between two bodies is directly proportional to ___________ and inversely proportional to the square of the distance between them.
According to Newton's Universal Law of Gravitation, the force between two bodies is directly proportional to ___________ and inversely proportional to the square of the distance between them.
In Newton's gravitational law, what does the variable 'r' represent?
In Newton's gravitational law, what does the variable 'r' represent?
When applying Newton's third law to gravitational forces, what is the relationship between the force on body 1 due to body 2 and the force on body 2 due to body 1?
When applying Newton's third law to gravitational forces, what is the relationship between the force on body 1 due to body 2 and the force on body 2 due to body 1?
How does the gravitational force vary with distance according to the assumption made at the beginning of the text?
How does the gravitational force vary with distance according to the assumption made at the beginning of the text?
When dealing with extended objects, why is it important to consider that Newton's law refers to point masses?
When dealing with extended objects, why is it important to consider that Newton's law refers to point masses?
What led Newton to propose his Universal Law of Gravitation?
What led Newton to propose his Universal Law of Gravitation?
