This discussion is closed.
streetyfatb
Badges: 0
#1
Report Thread starter 14 years ago
#1
Hi,

just getting to grips with the main concepts of this chapter, elastic strings and springs:

In an 8 sided tug of ware the front men in each team are 10m apart, and the men behind them are spaced out at intervals of 2m each. The rope has modulas elasticity of 50000N. On the command 'take the strain' each competitor pulls on the rope with a force of 120N. How much does the rope stretch:

1) between the two front men

2) between the two anchor men

I know this is an easy question for the topic, i just need to get the concept together.

Many thanks

Streety
0
Nima
Badges: 12
Rep:
?
#2
Report 14 years ago
#2
(Original post by S)
In an 8 sided tug of ware the front men in each team are 10m apart, and the men behind them are spaced out at intervals of 2m each. The rope has modulas elasticity of 50000N. On the command 'take the strain' each competitor pulls on the rope with a force of 120N. How much does the rope stretch:

1) between the two front men
2) between the two anchor men
1.) Between the 2 front men, there is 10m of rope ---> l (Rope) = 10m.
T (10m Section Of Rope) = 120 + 120 = 240N
T = (Lambda.x)/l
---> 240 = (50000x)/10
---> x = 2400/50000
---> x = 0.048m
---> Rope Stretches 4.80 cm

2.) Between the 2 anchor men, there is 2m of rope ---> l (Rope) = 2m.
T (2m Section Of Rope) = 120 + 120 = 240N
T = (Lambda.x)/l
---> 240 = (50000x)/2
---> x = 480/50000
---> x = 9.6 * 10^-3 m
---> Rope Stretches 0.96 cm
0
X
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Cardiff Metropolitan University
    Undergraduate Open Day - Llandaff Campus Undergraduate
    Sat, 19 Oct '19
  • Coventry University
    Undergraduate Open Day Undergraduate
    Sat, 19 Oct '19
  • University of Birmingham
    Undergraduate Open Day Undergraduate
    Sat, 19 Oct '19

Why wouldn't you turn to teachers if you were being bullied?

They might tell my parents (12)
6.42%
They might tell the bully (19)
10.16%
I don't think they'd understand (32)
17.11%
It might lead to more bullying (70)
37.43%
There's nothing they could do (54)
28.88%

Watched Threads

View All