Danyal124
Badges: 9
Rep:
?
#1
Report Thread starter 1 month ago
#1
Help!!!! Don’t know where 30 came from in part a answer the rest I got rightName:  6CC677EA-2D79-4707-8A7F-3A9F86DB2C04.jpeg
Views: 7
Size:  58.9 KB
0
reply
mqb2766
Badges: 19
Rep:
?
#2
Report 1 month ago
#2
It's really hard to read, can you upload again pls?
0
reply
Danyal124
Badges: 9
Rep:
?
#3
Report Thread starter 1 month ago
#3
(Original post by mqb2766)
It's really hard to read, can you upload again pls?
here it is
Attached files
0
reply
mqb2766
Badges: 19
Rep:
?
#4
Report 1 month ago
#4
What did you do when you took moments about A? The 679N is correct, but there is a bit of text missing on the previous line. For instance, the equation has no T, but there is also a bit more text missing.
Last edited by mqb2766; 1 month ago
0
reply
Danyal124
Badges: 9
Rep:
?
#5
Report Thread starter 1 month ago
#5
(Original post by mqb2766)
What did you do when you took moments about A? The 679N is correct, but there is a bit of text missing on the previous line. For instance, the equation has no T, but there is also a bit more text missing.
i used trig to find bottom legth f triangle/3 then did 3x sin(30)=20g x 1.5
0
reply
mqb2766
Badges: 19
Rep:
?
#6
Report 1 month ago
#6
(Original post by Danyal124)
i used trig to find bottom legth f triangle/3 then did 3x sin(30)=20g x 1.5
How does the left hand side of the equation represent a moment? The right hand side is a moment.
Why 3*sin(30)? Where is the unknown tension variable in the equation?
Last edited by mqb2766; 1 month ago
0
reply
Danyal124
Badges: 9
Rep:
?
#7
Report Thread starter 1 month ago
#7
(Original post by mqb2766)
How is the left hand side a moment? The right hand side is a moment.
Why 3*sin(30)? Where is tension in the equation?
i did Tsin(30)n sorry and LHS is Tsin(30) as the its oppersite the angle and same as rhs force
0
reply
mqb2766
Badges: 19
Rep:
?
#8
Report 1 month ago
#8
(Original post by Danyal124)
i did Tsin(30)n sorry and LHS is Tsin(30) as the its oppersite the angle and same as rhs force
Slightly better, but a moment is defined as
perpendicular force * distance
You're partially there, but what have you missed out on the left hand side?
Last edited by mqb2766; 1 month ago
0
reply
Danyal124
Badges: 9
Rep:
?
#9
Report Thread starter 1 month ago
#9
i have missed out the 30 but idk where it comes from also the answer has no T so this is more confusing
0
reply
mqb2766
Badges: 19
Rep:
?
#10
Report 1 month ago
#10
(Original post by Danyal124)
i have missed out the 30 but idk where it comes from also the answer has no T so this is more confusing
Tbh, Id take a break a bit from looking at model solutions and make sure you do some more basic questions to make sure you understand the concepts. Yes, the model solution has a typo, but the question is a fairly basic resolution of forces.

You have a triangle. The hypotenuse is the tension. How do you resolve that to find the component which is perpendicular to the rod?
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
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

Following the government's announcement, do you think you will be awarded a fair grade this year?

Yes (608)
49.23%
No (627)
50.77%

Watched Threads

View All
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