# Problem: A 750g mass is placed on a spring which lies on a frictionless surface. The spring has a spring constant k=500 N/m and is at its equilibrium length.(a) The spring is stretched so that it is 10.0 cm longer than its equilibrium length. How much elastic potential energy is stored in the spring now?(b) Now the spring from part (a) is released. What is the speed of the mass as it passes through the equilibrium point (x=0)?

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###### Problem Details

A 750g mass is placed on a spring which lies on a frictionless surface. The spring has a spring constant k=500 N/m and is at its equilibrium length.
(a) The spring is stretched so that it is 10.0 cm longer than its equilibrium length. How much elastic potential energy is stored in the spring now?
(b) Now the spring from part (a) is released. What is the speed of the mass as it passes through the equilibrium point (x=0)?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Energy in Simple Harmonic Motion concept. You can view video lessons to learn Energy in Simple Harmonic Motion Or if you need more Energy in Simple Harmonic Motion practice, you can also practice Energy in Simple Harmonic Motion practice problems .

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Tsai's class at UCSD.