Units and Measurements
Motion in a Plane
Laws of Motion
- Introduction to Laws of Motion
- Aristotle’s Fallacy
- Newton’s Laws of Motion
- Inertial and Non-inertial Frames of Reference
- Types of Forces
- Work Energy Theorem
- Principle of Conservation of Linear Momentum
- Impulse of Force
- Rotational Analogue of a Force - Moment of a Force Or Torque
- Couple and Its Torque
- Mechanical Equilibrium
- Centre of Mass
- Centre of Gravity
- Introduction to Gravitation
- Kepler’s Laws
- Newton’s Universal Law of Gravitation
- Measurement of the Gravitational Constant (G)
- Acceleration Due to Gravity (Earth’s Gravitational Acceleration)
- Variation in the Acceleration Due to Gravity with Altitude, Depth, Latitude and Shape
- Gravitational Potential and Potential Energy
- Earth Satellites
Mechanical Properties of Solids
Thermal Properties of Matter
Electric Current Through Conductors
- Electric Current
- Flow of Current Through a Conductor
- Drift Speed
- Ohm's Law
- Limitations of Ohm’s Law
- Electrical Power
- Specific Resistance (Resistivity)
- Variation of Resistance with Temperature
- Electromotive Force (emf)
- Combination of Cells in Series and in Parallel
- Types of Cells
- Combination of Resistors - Series and Parallel
Electromagnetic Waves and Communication System
- Projection of Satellite
- Weightlessness in a Satellite
- Time Period of a Satellite
- Binding Energy of an orbiting satellite
Any object revolving around the earth.
Satellite created by nature.
Example: - Moon is the only natural satellite of the earth.
Humans built objects orbiting the earth for practical uses. There are several purposes which these satellites serve.
Example:- Practical Uses of Artificial satellites are
Determining the Time period of Earth Satellite:-
Time taken by the satellite to complete one rotation around the earth is known as the time period of the satellite.
As satellites move in circular orbits there will be a centripetal force acting on it.
`"F"_c = "mv"^2/("R"_e + h)` it is towards the centre.
h = distance of the satellite from the earth
`"F"_c` = centripetal force.
`"F"_G = ("GM"_e"m")/("R"_e + "h")^2`
`"F"_g` = Gravitational force
m = mass of the satellite.
`"M"_e` = mass of the earth
`"F"_c = "F"_G`
`"mv"^2/("R"_e + "h")=("GM"_e"m")/("R"_e + "h")^2`
`"v"^2 = "GM"_e/("R"_e + "h")`
`"v" = sqrt("GM"_e/("R"_e +"h"))` ...(1)
This is the velocity with which satellite revolves around the earth.
The satellite covers distance = `2pi("R"_e +"h")` with velocity v.
`"T"=(2pi("R"_e + "h"))/"v"`
h << `"R"_e` (satellite is very near to the surface of the earth)
`"T" = 2pisqrt("R"_e/"g")`
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Related QuestionsVIEW ALL 
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