physics question nt sure?

Question

The flower pots are hanging stationary at a wall.
(the tension, T1 makes 30 degree.






                                           /&#92;  <--string
                                T1 /   &#92;  T2
                                   / ___&#92; 
                             FLOWER POT HERE
                              (weight= 10 N)

1.Compare tension T1 and T2. (the answers is the same but i dunno hw to get sum1 explain pls)

Another similar set up above is made but the angle now is 60 degree. Let the tension in the string be T3 and T4.

Compare tension T1 and T3.
my working is :

2T1 sin 30=10                2T3 sin 60=10
T1 sin 30=5                       T3 sin 60 =5
T1=10 N                             T3=5.78N

Hence, my answer is T1 has higher tension but my book answers is T3 higher tension than T1(can explain wat i did wrong? by resolving the force, the force horizontally is cos while vertically is sin.
take vertical force = weight
shud be correct right/

JullyWum · Accepted Answer

1) .. your question isn't clear to me .. "how to get sum 1" ?
T1 = (½ x 10N) / sin30 
T2 = (½ x 10N) / sin30 .. .. hence T1 = T2

2) Your calculations to compare T1 and T3 are correct .. .. looks like your book is wrong.

Mugwump · Answer

Hello Lucie

You are absolutely right.  If the book says that T3 tension is higher than T1 than it must be a misprint.  You did the problem just right.

Good Luck.

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physics question nt sure?

2 Answers