Podcast
Questions and Answers
What kind of forces are spring force, gravitational force, and Coulomb force?
What kind of forces are spring force, gravitational force, and Coulomb force?
- Frictional forces
- Centripetal forces
- Non-conservative forces
- Conservative forces (correct)
What is the dependence of both gravitational force and Coulomb force on distance?
What is the dependence of both gravitational force and Coulomb force on distance?
- Exponential dependence
- Inverse-square dependence (correct)
- Linear dependence
- No dependence on distance
What happens to the sum of kinetic and potential energies for a body when the external force is removed?
What happens to the sum of kinetic and potential energies for a body when the external force is removed?
- Increases
- Becomes zero
- Decreases
- Remains conserved (correct)
What is the electrostatic potential energy of a charge in an electrostatic field analogous to?
What is the electrostatic potential energy of a charge in an electrostatic field analogous to?
Under what condition will a test charge q move from a point R to a point P against the repulsive force due to the charge Q?
Under what condition will a test charge q move from a point R to a point P against the repulsive force due to the charge Q?
Work done in taking a body from one point to another against a conservative force gets stored as potential energy of the body
Work done in taking a body from one point to another against a conservative force gets stored as potential energy of the body
The sum of kinetic and potential energies is not conserved for conservative forces
The sum of kinetic and potential energies is not conserved for conservative forces
The Coulomb force between two stationary charges is not a conservative force
The Coulomb force between two stationary charges is not a conservative force
The masses in the gravitational law are replaced by charges in Coulomb's law
The masses in the gravitational law are replaced by charges in Coulomb's law
The potential energy of a charge in an electrostatic field can be defined similar to the potential energy of a mass in a gravitational field
The potential energy of a charge in an electrostatic field can be defined similar to the potential energy of a mass in a gravitational field
