Fields
- Created by: sherv1360
- Created on: 04-03-17 14:26
View mindmap
- Gravitational Fields
- Newtons law of gravitation states that the gravitational force between two point masses is directly proportional to the product of there masses and inversely proportional to the square of the distance.
- Gravitational potential and gravitational potential energy
- Gravitational potential at a point in a gravitational field is the work done in moving a unit of mass from infinity to that point.
- Escape velocity at a point in a gravitational field is the minimum launch velocity required to move a unit of mass form that point to infinity.
- Gravitational potential energy is defined as -GMm/r
- Both graphs have a negative y axis as gravity is an attractive force.at infinity energy is 0.
- Gravitational potential at a point in a gravitational field is the work done in moving a unit of mass from infinity to that point.
- gravitational field strength is the negative gradient of gravitational potential.
- Both graphs have a negative y axis as gravity is an attractive force.at infinity energy is 0.
- Kepler's Laws
- 2 .A line joining the sun to a planet will sweep out equal areas in equal times.
- 1. planets travel around the sun in elliptical orbits
- 3. The square of the time period of a planet orbiting the sun is directly proportional to the mean radius cubed.
- Definitions
- Gravitational Fields
- A region around a body in which other bodies will feel a force due to the mass of the body
- gravitational Field Lines
- Show the shad and direction of the field line at a point in the direction in which a small mass would move if placed at that point.
- Gravitational Field strength
- Is defined as the force per unit mass placed at point in the field. g=F/M
- Gravitational Fields
- Equations
- F=-GMm/R^2
- Vg=GM/r
- T^2=(4pi^2/GM)r^3
- E=GMm/r
Comments
No comments have yet been made