Join TSR now and get all your revision questions answeredSign up now

Further Mechanics question..help needed Watch

    • Thread Starter
    Offline

    0
    ReputationRep:
    A light elastic string of natural length 1.6 m has modulus of elasticity 100 N. One end of the stringis attached to a fixed point. A particle of mass 4 kg is attached to the other end. Find the extension,e metres, of the string when the particle hangs freely in equilibrium at E. [2] When the particle is in equilibrium at E, it is given a blow of impulse 20 N s vertically downwards.Show that, while the string remains taut, the motion of the particle is simple harmonic, and find theperiod and amplitude of this simple harmonic motion. [8]
    Find also the time that elapses between the blow and the instant when the string first becomes slack.[4]
    Offline

    15
    ReputationRep:
    (Original post by brocode)
    A light elastic string of natural length 1.6 m has modulus of elasticity 100 N. One end of the stringis attached to a fixed point. A particle of mass 4 kg is attached to the other end. Find the extension,e metres, of the string when the particle hangs freely in equilibrium at E. [2] When the particle is in equilibrium at E, it is given a blow of impulse 20 N s vertically downwards.Show that, while the string remains taut, the motion of the particle is simple harmonic, and find theperiod and amplitude of this simple harmonic motion. [8]
    Find also the time that elapses between the blow and the instant when the string first becomes slack.[4]
    http://www.thestudentroom.co.uk/showthread.php?t=403989
    • Thread Starter
    Offline

    0
    ReputationRep:

    Im sorry, was about to post my working.


    Can you please help me with the second part. How to get the amplitude.
    Attached Images
     
    Offline

    15
    ReputationRep:
    (Original post by brocode)
    Im sorry, was about to post my working.


    Can you please help me with the second part. How to get the amplitude.
    the amplitude is the distance from the point of zero speed to the centre of the oscillation
 
 
 
Poll
Which pet is the best?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.