### Angular Acceleration

What is Angular Acceleration, Centripetal Acceleration and Tangential Acceleration?

Angular Acceleration is the rate of change of angular velocity. It is usually expressed in and is denoted by a Greek letter α (alpha). It is also a vector quantity.

Notes : 1. If the body is moving along a circular path of radius r and with angular acceleration α, then its linear acceleration is given by

a = αxr

2. When a body moves along a circular path, its linear acceleration will have two components; one is the normal component and other is tangentia1 component. The normal component of the acceleration is known as normal or centripetal acceleration (ac). Its value is given by

3. When the body moves along a circular path with uniform velocity, then there will be no tangential acceleration, but it will have only centripetal acceleration.

4. When the body moves along a straight path, then there will be no centripetal acceleration, but it will have only tangential acceleration, in the same direction as its velocity and displacement.

### Are Engineers Favourite Among Girls?

What do girls think about men who are engineers and what type of engineers are most favourite among girls? A survey was conducted by a team of aboutmech with members chosen from different countries. Each team member carried out a neutral survey in his/ her country to evaluate what females think about most of the engineers from different engineering branches. An overview of different questions asked in survey is given below: Question: Which male engineers do you find more attractive as a husband? Almost 50% women voted for mechanical engineers to be the most attractive husbands among other engineers. So mechanical engineers are most favourite among girls as a husband. They find them more trustworthy, intelligent, and creative. A married women from California said, “If your husband is a mechanical engineer, he will help you in everyday tasks. Because mechanical engineers are good team players and they have creative ideas about everything.” Which male engineers do you find more