1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Finding mechanical energy of simple harmonic oscilator

  1. Jul 25, 2015 #1
    1. The problem statement, all variables and given/known data

    A simple harmonic oscillator consists of a block of mass 45 g attached to a spring of spring constant 240 N/m, oscillating on a frictionless surface. If the block is displaced 3.5 cm from its equilibrium position and released with an initial velocity of 2.5 m/s, what is its total energy?
    • A

      0.15 J

    • B

      The total energy varies during each cycle of oscillation.

    • C

      0.20 J

    • D

      0.29 J

    • E

      0.14 J

    2. Relevant equations
    E = 0.5kx^2+0.5mv^2

    3. The attempt at a solution
    I plugged in the values into the formula and I got 0.14J but the answer is 0.29J
  2. jcsd
  3. Jul 25, 2015 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    What values did you plug into the formula?
  4. Jul 25, 2015 #3
    k=240 N/m
    v = 2.5 m/s
  5. Jul 25, 2015 #4
    Actually I just plugged in the values again and I got the answer. Sorry about that
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted