# circular motion

### Weightlessness in a Satellite-feeling weightless

Weightless astronaut-Weightlessness in Orbiting Satellites In this post we will discuss how does an astronaut feel weightless in a nearby orbit and what is the secret behind this weightlessness in a satellite? To start with lets see how we feel this weight. If an object rests on a surface, its weight acts downwards on the

### Angular Momentum & Moment of Inertia for Rotational Motion

Angular Momentum In our last post we have discussed on Linear momentum. Just to brush up, when an object of mass m moves with a speed v in a straight line, we say that it has a linear momentum, p=mv. When the same object moves with an angular speed ω along the circumference of a

### Kepler’s Third Law equation derivation-explained

Kepler’s Third Law As we have derived the equations of Orbital velocity of satellite in our last post, this is the right time to discuss on an important Law of Physics, which talks on the period of its revolution. This is known as Kepler’s Third Law or 3rd Law of Kepler. The basis of deriving

### Orbital Velocity of Satellite-derivation of 3 expressions

Orbital Velocity of Satellite Definition: Orbital Velocity of a satellite is the minimum velocity it has to maintain to continue its circular motion in its orbit. We know for a circular motion to continue, a force called centripetal force is required to work upon the object in circular motion. And this force is a real

Older Posts››