Gravitation Fields of Force Flashcards
What does Newton’s law state?
Newton’s law states that the force between 2 point masses is directly proportional to the product of the masses and inversely proportional to the distance between them squared
What is the equation of force between 2 masses?
F = G * Mm/r^2
Why is the force experienced on both masses?
The force is experienced on both masses due to Newton’s 3rd Law
Why are the masses considered point masses?
Gravitational force experienced due to spherical mass is the same as the force produced by having all it’s mass stored in its center
What is the gravitational field strength of a point mass?
The gravitation field strength is the force per unit mass on a small mass at that point
How do you calculate the electrical field strength of a point mass?
E = G * M/r^2
What direction are gravitational field lines?
Always attractive, so they are inwards
What is gravitational potential?
Gravitational potential is the work done per unit mass in bringing a mass from infinity to that point
What is the gravitational potential at infinity?
Gravitational potential at infinity is 0
What is the equation for gravitational potential?
V = -G * M/r
How do you calculate the equation for gravitational potential energy?
PE = =G * Mm/r
What is the escape velocity?
The velocity needed to reach infinity with no kinetic energy remaining
What is the equation of conservation of energy for gravitational fields of forces?
mv^2/2 + (- G * Mm/r) = 0
