# Mass attached to vertical spring

#### sualeh

1. The problem statement, all variables and given/known data

an object of mass 0.4kg is attached to horizontal spring of ,,spring constant 80N/m,,and it is displaced 0.1m from equilibrium postion and released from rest,,such that it perform up and down simple harmonic motion.find its velocity when it passes through equilibrium point

2. Relevant equations

k.e=kinetic energy.....k.e=0.5><(mg)^2/k....

3. The attemp at a solution
solving above equation will give,,v=0.7,,,but in solution key it is 1.4m/s ref(serway physics vol 8..ch#13,pg451,,ques,4

Related Introductory Physics Homework News on Phys.org

#### CAF123

Gold Member
Sketch a free body diagram for the mass and write NII for its motion. Then use the initial conditions to find the position of the mass as a function of t, from which you can obtain its velocity as a function of t.

### Want to reply to this thread?

"Mass attached to vertical spring"

### Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving