Question

Q.3. Define centre of gravity.
Q.4. Find the position of the centre of mass of two particle of masses 3 kg and 5 kg,
if the distance between them is 20 cm
Q.5. Define unstable equilibrium.
SECTION B
SE
Tintinmuish between elastic and inelastic collisions.
nf 500 m/s. If the velocity of rec​

Answer 1

Answer:

3] gravity, in physics, an imaginary point in a body of matter where, for convenience in certain calculations, the total weight of the body may be thought to be concentrated. The concept is sometimes useful in designing static structures (e.g., buildings and bridges) or in predicting the behaviour of a moving body when it is acted on by gravity. 4] in photo