Physics Paper 1- Grav Fields

Cards (14)

What is G?
Gravitational constant
What are the two types of grav fields?
Radial, Linear
Define g
The force per unit area
What is newtons gravitational law?
Force is inversely proportional to the square of the distances between them and directly proportional to the product of their masses
State keplers 1st law
Tge orbit of a planet is ellipse with the sun at one focus
State keplers 2nd law
The line segment that joins a planet and the sun sweeps out equal areas during the same time
State keplers 3rd law
Time period squared is directly proportional to the radius cubed
What is an satellite?
objects that orbit other larger objects
What are the two types of satellites?
Natural such as the moon
Artificial such as NASA
What are geostationary satellites?
Have a time period of 24hrs
They orbit at a distance of 32,000km
They are used for communications
They orbit the equator
What is gravitational potential?
The potential energy per kg at any point in a system
0 potential is classed as infinity
What is grav potential difference?
The difference between two grav potentials of two points in a grav field
What is escape velocity?
The min velocity an object requires in order to escape a grav field of an object
How do you derive escape velocity?
Kinetic Energy equation= grav potential energy equation