Question

by three ropes as shown. Determine the magnitude of the tension in each rope when a...

by three ropes as shown. Determine the magnitude of the tension in each rope when a person with a weight of

Wp = 700 N

is a distance

d = 0.700 m

from the left end.

magnitude of

Trightharpoonhead.gif1

    
Incorrect: Your answer is incorrect.
Since the scaffolding is in equilibrium, we expect to use the first and second condition of equilibrium. Since the second condition of equilibrium involves torque, before starting the problem, see if you can write an expression for the torque in terms of the force producing the torque, the magnitude of the vector which locates the point of application of the force relative to the point about which we are taking the torques, and the angle between the direction of the force and the vector which locates the point of application of the force. In order to determine the torques, we have to establish the point about which we are going to determine the torques. What is a convenient choice for the point about which to determine the torques? Using this specified point, see if you can write a second condition of equilibrium statement that will allow you to express the tension

T1

in terms of known quantities. N
magnitude of

Trightharpoonhead.gif2

Incorrect: Your answer is incorrect.
For the first response in this problem, you determined the tension

T1

. Now that you know the value of the tension

T1

, see if you can write a vertical first condition of equilibrium statement that will allow you to express

T2

in terms of

T1

and other known quantities. N
magnitude of

Trightharpoonhead.gif3

Incorrect: Your answer is incorrect.
For the first response in this problem, you determined the tension

T1

. Now that you know the value of the tension

T1

, see if you can write a horizontal first condition of equilibrium statement that will allow you to express

T3

in terms of

T1

and other known quantities. N

9-p-018.gif

T1= 508 is wrong

T2=373 is wrong

T3=389 is wrong

0 0
Add a comment Improve this question Transcribed image text
Answer #1

=====

considering moment about left end of plank

28* 9.8 ( 1.5 / 2) + 700 * 0.7 = T1 sin 40 * 1.5

T1 = 721.65 N

=====

T3 = T1 cos 40 = 552.815 N

====

c)

considering forces along vertical

T2 = 28* 9.8 + 700 - 721.65 sin 40 = 510.532 N

=======

Comment before rate in case any doubt, will reply for sure.. goodluck

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