Explain some situations where the center of gravity of man lies outside the body. `(AS_(1))`

Where does the center of gravity of the atmosphere of the earth lie? (AS_(2))

Give two examples of a rigid body where the center of mass lies outside in material of rigid body.

Explain the variations of acceleration due to gravity inside and outside the earth and draw the graph.

What is potential energy ? Derive an equation for gravitational potential energy of a body of mass 'm' at a height 'h'. (AS_(1))

What is kinetic energy ? Derive an expression for the kinetic energy of a body of mass 'm' moving at a speed 'v'. (AS_(1))

Explain density and relative density and write their formulae. (AS_(1))

Find the free-fall acceleration of an object on the surface of the moon, if the radius of the moon and its mass are 1740 km and 7.4 xx 10^(22) kg respectively. Compare this value with free fall acceleration of a body on the surface of the earth. (AS_(1))

Caliculate the acceleration of the moon towards earth’s center (AS_(1))

What is the function of receptors in our body ? Think of situations where receptors do not work properly. What problems are likely to arise ?

If the mass of earth is M, radius R and G is universal gravitational constant then the workdone against gravity to move a body of mass 1 kg from the surface of earth to infinity will be