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Question

Find the potenial energy possessed by a body of mass 4 kg when it is at height of 10 m above the ground. (Take g=10 ms2)
  1. 200 J
  2. 400 J 
  3. 600 J 
  4. 800 J 


Solution

The correct option is B 400 J 
Given mass, m=4 kg
Height, h=10 m
Accelearation due to gravity, g=10 ms2

As we know,
Potential energy =mgh
                            =4 ×10 ×10
                            =400 J
                                           
 

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