CBSE Class 11-science - Law of Gravitation Videos

• 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  ...?                            
• A planet moves around the earth in nearly circular orbit. Its period of revolution ‘T’ depends upon: (i) radius ‘r’ of the earth (ii) mass ‘m’ of the sun (iii) the gravitational constant ‘G’. Show dimensionally that T2 DIRECTLY PROPORTIONAL TO r3
• mm
  

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