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Examen
Exam (elaborations) r UPSC 21098
Work is said to be done, if force acting on a body is able 
to actually move it through some distance in the direction 
of the force. Its SI unit is a joule. 
ENERGY 
• Energy is a scalar quantity and its unit is Joule. 
• The sum of all kinds of energies in an isolated system 
remains constant at all times. This is the law of 
conservation of energy. 
POWER 
Its unit is watt. 
• 1 watt hour = 3600 Joule 
• 1 kilowatt hour = 3.6 x 106 
joule 
• 1HP = 746 watt 
GRAVITATION 
• Everybod...