CBSE Class 11 science: Law of Gravitation Videos | Gravitation

• the decrease in the value of g at height h from earth s surface
• find the value of accl due to gravity in a mine at a depth of 80km from the surface of the earth
• Mention the method of determining the mass of planets star etc 
• 4 identicle bodies of mass m are located at vertices of square of side l they revolve under the effect of mutual gravitational force in circle circumscribing the square then the speed of each body will be
• why the value of g is zero at the centre of the earth
• Please give answer
  
• what is the derivation of formula of gravity  
• if acceleration due to gravity g at height h
• what is gravitational force
• SI unit of gravitational force is Nm²kg^-2 OR Nm²kg²  ...?                            

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