6.1a Ex3 MJ20 P12 Q18 Stretched String Hanging Mass | May/June 2020 | CAIE A Level 9702 Physics
Example 3 - 9702/12/M/J/20: An elastic cord of unstretched total length 16.0 cm and cross-sectional area 2.0 × 10^-6 m^2 is held horizontally by two smooth pins a distance 8.0 cm apart.
The cord obeys Hooke’s law. A load of mass 0.40 kg is suspended centrally on the cord. The
angle between the two sides of the cord supporting the load is 60°.
What is the Young modulus of the cord material? #9702s20p12 #ASdeformationP1 #ASforcesP1 #Lv3
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Пікірлер: 28
People asking why tension is not multiplied by two it's because in a single string there's only one tension force not 2 so 1 tension is halved in both sides but it's only 1.
@AbdulRahman-vy7ko
Ай бұрын
Yeah makes sense! Also are you giving p1 the day after tomorrow?
why did you use tension for 'F' shouldnt it be the weight of the object since that is the force acting of the cables
@mizbasami3960
4 ай бұрын
The force is the tensile force exerted on the rubber band.
@UzumakiNaruto-rp9tr
Ай бұрын
as due to the tension force, the string is extended n not the weight. so for force only the tension is taken
why did you use the tension instead of using the weight directly in the formula?
@UzumakiNaruto-rp9tr
Ай бұрын
as due to the tension force, the string is extended n not the weight. so for force only the tension is taken
Thank you ！！！！
Thank you
thank you, this was very helpful
HOPE YOU SEE THIS! As others have asked, why don't we multiply T by 2?
@rabiasharjeel2020
9 ай бұрын
this is because there are two strings, therefore, there are two tension forces
@bonzopippinpaddleopsicopolis
Ай бұрын
@@rabiasharjeel2020 no
Mechanics p4 of of maths is very useful here
@riadulislam4849
5 ай бұрын
yeah ....
Thanks
I don't understand how you came to conclude that 2Ty is equal to mg
@tahabashir9405
Жыл бұрын
the mass is suspended which means the mass hangs at its rest postion. If either would be greater than the other that is (2ty and mg ) the mass would not be suspended. Hence 2ty= mg. Dont know about the elastic part but this logic is this
tq
Why can't we just use W=mg
@StarFury2
2 жыл бұрын
Weight mg acts on the mass, tension acts on the cord. Weight on mass is constant, but tension in the cord here greatly depends on angle between its two ends.
@tahabashir9405
Жыл бұрын
@@StarFury2 good catch every one is asking but you caught that.
Plz can u guyz help me this
@studymeo
5 ай бұрын
sure, what do you wanna ask?
I hate paper 1 its harder than 2
@AbdulRahman-vy7ko
Ай бұрын
REALLLL the day after tom is p1 and I am panicking lmao
@neptune4434
Ай бұрын
@@AbdulRahman-vy7ko i feel like i will be cooked
@AbdulRahman-vy7ko
Ай бұрын
@@neptune4434 SAME 😭 may God help us 💀 I still have superposition and DC circuits to finish 😔 I hate them so much