Calculate the speed of projection necessary to send a body right out of the filed of the earth's grvivtational attraction.
`G= 6.63 xx10^(-11)` "newton `metre^(2)`" `Kg^(2)`
Mass of the earth = `5.97 xx 10^(24)`
Radius of the earth = ` 6.37 xx 10^(6) m`.

Calculate the acceleration due to gravity on the earth from the following data G= 6.6 xx 10 ^(-11) N m^(2) Kgm^(-3) Mean density of the earth = 5xx 10 ^(-3) kgm Radius of the earth = 6.4 xx10 ^(6) m .

Calculate the mass and density of the earth. Given that Gravitational constant G = 6.67 xx 10^(-11) Nm^(2)// kg^(2) , the radius of the earth = 6.37 xx 10^(6) m and g = 9.8 m//s^(2) .

Calculate the acceleration due to gravity on the earth 's surface , given that gravitational constant G = 6.7 xx 10^(-11) SL unit , radius of he earth = 6. 4 xx 10 ^(6) m and mean density of earth = 5.5 xx 10^(3) kg m^(-3) .

The period of moon around the earth is 27.3 days and radius of the orbit is 3.9 xx 10^(5) km . G=6.67 xx 10^(-11) Nm^(-2)kg^(-2) , find the mass of the earth.

What is the magnitude of the gravitational force between the Earth and a 1kg object on its surface ? (Mass of the earth is 6xx10^(24) kg and radius of the Earth is 6.4xx10^(6) m) .

How much energy will be needed for a body of mass 100kg to escape from the earth- (G = 10M//S^(2) and radius of earth = 6.4 xx 10^(6) m)

A projectile is to be launched from the surface of the earth so as to escape the solar system. Consider the gravitational force on the projectile due to the earth and the sun nly. The projectile is projected perpendicular to the radius vector of the earth relative to the centre of the sun in the direction of motion of the earth. Find the minimum speed of projection relative to the earth so that the projectile escapes out of the solar system. Neglect rotation of the earth. mass if the sum M_(s)2xx10^(30)kg, Mass of the earth M_(e)=6.4xx10^(24)kg Radius if the earth R_(e)=6.4xx10^(6)m, Earth- Sun distence r=1.5xx10^(11)m

An apple of mass 0.25 kg falls from a tree . What is the acceleration of the apple towards the earth ? Also calculate the acceleration of the earth towards the apple . Mass of the earth = 5.983 xx 10^(24) kg , Radius of the earth = 6.378 xx 10^(6) m and G = 6.67 xx 10^(-11)Nm^(2) kg^(-2)

A satellite orbits the earth at a height of 400 km, above the surface. How much energy must be expended to rocket the satellite out of the earth's gravitational influence ? Mass of the satellite=200 kg, mass of the earth= 6.0xx10^(24) kg, radius of the earth= 6.4xx10(6) m, G= 6.67xx10^(-11)Nm^(2)Kg^(-2) .