Circular Motion and Gravitation
What conservation law applies to a closed system when no net external forces act on it?
Conservation of mass
Conservation of energy
Conservation of charge
Conservation of momentum
Which formula calculates gravitational force between two masses?
If you replaced an electrostatic force measurement setup in Coulomb's law experiment with stronger charges, how would this impact observed force between them?
The distance between charges needed to measure a specific force value increases proportionally.
There would be no change in electrostatic force between them.
The electrostatic force between them would decrease.
The electrostatic force between them would increase.
What happens when magnetic field lines are forced closer together around a current carrying wire?
The magnetic field strength increases
The magnetic field strength decreases
The current carrying capacity reduces
There will be an increase in electrical resistance within wire
Which factor affects both voltage drop across and current through resistors connected serially in a simple DC power supply?
Temperature of surrounding environment
Material making up resistor
Resistance of each resistor
Voltage of power supply
Which fundamental force has infinite range and acts between all masses?
Electromagnetic force.
Gravitational force.
Strong nuclear force.
Weak nuclear force.
What principle states that the total electric charge in an isolated system remains constant?
Conservation of energy
Conservation of momentum
Conservation of mass
Conservation of charge

How are we doing?
Give us your feedback and let us know how we can improve
How would the gravitational force between two objects change if the distance between them is halved and the mass of one object is doubled?
It decreases by a factor of 2
It increases by a factor of 8
It remains constant
It increases by a factor of 4
Assuming conservation of energy in a pendulum system, what happens when air resistance becomes significant?
Oscillation period will increase.
Amplitude remains undisturbed despite atmospheric drag forces being taken into consideration.
Magnitude diminishes rapidly upon inception thereof hinderance.
Frequency reduces momentously.
If gravitational potential energy is converted into kinetic energy as an object falls freely toward Earth, what happens to the total mechanical energy of the system in the absence of air resistance?
It increases due to acceleration from gravity.
It remains constant because energy is conserved.
It decreases as potential energy is lost during the fall.
It fluctuates due to changes in kinetic and potential energies.