## Motion in a vertical circle and conservation of energy

A stone  tied to a string of length l is whirled around a vertical circle with the other end of the string at the centre. At a certain instant of time the stone is at the lowest position and has a speed u. What is the magnitude of change in its velocity as it reaches…… Continue reading Motion in a vertical circle and conservation of energy

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## Homework from vectors

A man walks 10 km towards west and then 12 km (60 degree_ direction of North-East. find the resultant vectors, magnitude and direction. A man walks 10 km towards west and then 15 km towards south. Find the resultant vectors, magnitude and direction. Ju…

## A Problem from kinematics

The magnitude of the velocity of a particle changes uniformly from 14 m/s downward at point A to 4 m/s at point B. As the particle moves alongthe path from A to B determine the acceleration of the partice when it is at point C. Incoming search terms:kinematics magnitude of the velocity of a particle […]

## Superfast laser cooling

Researchers propose a …