Advertisements
Advertisements
Question
Explain the term ‘centre of gravity’ of a body.
Advertisements
Solution
A body can be considered to be made up of a number of particles, each particle has weight ‘W’. Weight of all these particles acts vertically downward and can be replaced by a single resultant force. This force passes through a fixed point. ‘G’ which is a point where the algebraic sum of moments of weight of all the particles is zero and is called the centre of gravity of the body.
Thus we can define ‘CG’ as ‘the point through which the weight of the body acts irrespective of the position of the body.’
RELATED QUESTIONS
Give an example of a non-contact force which is always of attractive nature
On what factor does the position of the center of gravity of a body depend?
Following Fig shows piece of cardboard of uniform thickness cut into different shapes. Draw two lines to indicate the position of centre of gravity G.
Give scientific reason for the following:
In a doubled decker bus passengers are not allowed to stand in the upper deck.
The centre of gravity of a hollow cone of height h is at distance x from its vertex where the value of x is ______.
Explain why One leans forward while climbing up a hill.
Explain why a ship loaded with light goods is more liable to be overturned than the one loaded with heavy goods.
In ______ equilibrium, the centre of gravity remains at the same height when it is displaced.
What is centre of gravity ?
