The weight of a body acts through the centre of
A). Gravity
B). Mass
C). Both (A) and (B)
D). Buoyancy
Gravity
The centre of gravity of a collection of masses is the point where all the weight of the object can be considered to be concentrated. The entire weight acts through the center of gravity instead of acting through the individual masses. In a uniform gravitational field (like the field close to the surface of the Earth) the Centres of Gravity and Mass are in exactly the same place.
1. When a vibrating tuning fork is placed on a table a loud sound is heard. This is due to :
4. Rate of change of momentum is
5. Which one among the following rroups is the most abundant in terms of number os species identified?
6. One billionth of a second is called
7. Vehicle tyres are inflated properly
8. What is the reason for formation of Mirage in desert?
9. Chlorofluro carbons are widely used?in :
10. A water tank appears shallower when it is viewed from top due to