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Grade: 11

                        

A vertically hanging spring is elongated by x (in equilibrium) when mass m is hanged from it. What is the work done by a man in slowly lowering the mass by a distance y further.

4 years ago

Answers : (1)

Rahul Yadav
19 Points
							The difference of energy of two positions is equal to work done i.e     1/2 kx^ 2  - (1/2ky^2-mgy)=k/2(x^2-y^2)+mgy
						
4 years ago
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