Present Remotely
Send the link below via email or IM
Present to your audience
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
8. Gravitational Field Summary
GCE A Level H2 Physics - Teaching Tool
Transcript of 8. Gravitational Field Summary
photo credit Nasa / Goddard Space Flight Center / Reto Stöckli
Gravtational Force
NEWTON's LAW of GRAVITATION
Gravitational Field Strength
gravitational force per UNIT MASS
of object with mass M
Gravitational Potential
Work Done in moving UNIT MASS from infinity to final point (radius R away from centre of body of mass M)
Gravitational
Potential Energy
Work done required in moving body of mass m from infinity to final position (radius R away from centre of body of mass M)
Escape Velocity
minimum kinetic energy required for gain in GPE from surface to Earth to INFINITY
GRAVITATIONAL FIELD
summary
gravitational constant
Earth: g = 9.81 N/kg
gravitational field lines
gravitational potential at infinity = ZERO
Equipotential Surface
mrcheung
Satellites in Circular Orbits
Gravitational Force = Centripetal Force
GRAVITATIONAL FIELD
minimum starting velocity
loss in KE = gain in GPE
i.e. Earth surface - only KE -->
infinity - only GPE, no KE
Geostationary Orbit
Period of revolution, T = 24 hours
plane of revolution in plane with Equator
satellite revolves from WEST to EAST
Energy of Satellite in Orbit
U
g
gravitational field strength
gravitational force
gravitational potential energy
gravitational potential
Full transcriptGravtational Force
NEWTON's LAW of GRAVITATION
Gravitational Field Strength
gravitational force per UNIT MASS
of object with mass M
Gravitational Potential
Work Done in moving UNIT MASS from infinity to final point (radius R away from centre of body of mass M)
Gravitational
Potential Energy
Work done required in moving body of mass m from infinity to final position (radius R away from centre of body of mass M)
Escape Velocity
minimum kinetic energy required for gain in GPE from surface to Earth to INFINITY
GRAVITATIONAL FIELD
summary
gravitational constant
Earth: g = 9.81 N/kg
gravitational field lines
gravitational potential at infinity = ZERO
Equipotential Surface
mrcheung
Satellites in Circular Orbits
Gravitational Force = Centripetal Force
GRAVITATIONAL FIELD
minimum starting velocity
loss in KE = gain in GPE
i.e. Earth surface - only KE -->
infinity - only GPE, no KE
Geostationary Orbit
Period of revolution, T = 24 hours
plane of revolution in plane with Equator
satellite revolves from WEST to EAST
Energy of Satellite in Orbit
U
g
gravitational field strength
gravitational force
gravitational potential energy
gravitational potential