Physics Help Forum a elastic spring question
 User Name Remember Me? Password

 Equilibrium and Elasticity Equilibrium and Elasticity Physics Help Forum

 Oct 23rd 2009, 08:59 PM #1 Junior Member   Join Date: Jun 2009 Posts: 7 a elastic spring question A linear elastic spring is 0.15m long. When the upper end is held in the hand and a 0.5kg mass is suspended from the lower end, its length becomes 0.220m. If the hand is now jerked quickly upward, the spring first extends to a length of 0.285m, then the mass starts to move up. The hand is then held still. a)Calculate the acceleration with which the mass first begins to move. b)Calculate the speeed of the mass when the length of the spring becomes 0.22m again. c)Calculate the length of the spring when the mass comes to rest at its highest point So Far.. a) Energy is conserved. Ee=Ek Ee=Fx^2 /2 x= 0.285-0.15 (at maximum) since the mass is not moving initially, there is neither work nor energy initially. Only enlastic energy is acting on it. and then,,, i have no idea what to do Last edited by nicefatsow; Oct 25th 2009 at 06:19 PM.
 Oct 23rd 2009, 09:06 PM #2 Physics Team   Join Date: Feb 2009 Posts: 1,425 Please post your attempt.

 Tags elastic, question, spring

 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post jlyu002 Energy and Work 11 Aug 26th 2015 12:55 PM stalebhacine Advanced Thermodynamics 0 Mar 14th 2015 10:49 AM fireemblem13 Kinematics and Dynamics 2 Dec 30th 2009 11:27 PM omirs Kinematics and Dynamics 7 Dec 26th 2009 08:54 AM JOHNH Advanced Mechanics 0 Dec 3rd 2008 10:39 AM