A vertical spring stores 0.930 J in spring potential energy when a 3.5-kg mass is suspended...

Question

Question

A vertical spring stores 0.930 J in spring potential energy when a 3.5-kg mass is suspended from it.

a) Verify your answer to part A by calculating the spring potential energy when a 7.0-kg mass is attached to the spring.

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Answer 1

Answer #1

Potential Energy PE = 1/2kx²

Force F=mg=kx

Therefore x=mg/k

Therefore PE=1/2 k (mg/k)²

= (mg)²/2k

so when the mass gets doubled to 7kg
The potential energy PE will become 4 times.

New PE= 4 x 0.930 = 3.72 J Answer

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Answer 2

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