# circular motion

## Law of Conservation of Angular Momentum – statement and derivation

State the Law of Conservation of Angular Momentum The Law of Conservation of Angular Momentum states that angular momentum remains constant if the net external torque applied on a system is zero. So, when net external torque is zero on a body, then the net change in the angular momentum of the body is zero. […]

## Apparent weight of moving car over a convex or concave bridge

Apparent weight of a moving car over a convex or concave bridge is the amount of Normal Reaction the car receives while traveling over the bridge. Here the system consists of the car, the bridge which is either convex or concave and the motion of the car along the curvature. So to start off we […]

## Weightlessness in a Satellite-feeling weightless 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 surface. According to Newton’s third […]

## Angular Momentum

When an object moves with an angular speed ω along the circumference of a circular path of radius r, then we say that it has an angular momentum. Angular momentum is the rotational equivalent of linear momentum and is defined as the moment of Linear momentum. It depends on 2 quantities, one is rotational inertia […]

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