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Work done by spring

  • #1

Homework Statement


A mass of 0.103 kg hangs from a spring. you pull the mass down and has a speed 3.60 m/s. The mass moves down .10 m.
What was the work done by the earth?
When the mass moved downward, it slowed down to 2.66 m/s. What was the work done by the spring.


Homework Equations


Work done by earth = m*g*d
Work done by spring = 1/2 m*[tex]\Delta[/tex]v2?


The Attempt at a Solution


I got the work done by the earth to be 0.10094 J.
I can't seem to get the work done by the spring. Is that the right formula? Am i suppose to take the rest energy of the spring and add that to the work done by the Earth?
 

Answers and Replies

  • #2
452
0
Use conservation of energy problem [tex]E_i = E_f[/tex] to determine work done by the spring.
 

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