Biology; Chemistry; Physics: Post your doubts here!

[asd]

When two springs are attached, the extensions are halved because the load divides. Imagine just one spring attached; It's length would be 2x (Weight of the load doesn't divide now - only one spring is present). So for 2 springs it will be 4x!
ashiqbal

 

[Fallen316]

also can someone explain the MCQ 9?

in fisrt picture, the load is supported by 2 springs which means that half of the load acts on each spring.
in 2nd picture, load acts on each spring and produces twice the extension in pic 1. which means 2x on each spring
so, 2x + 2x = 4x, option D

 

[Dukeofwin]

also can someone explain the MCQ 9?

Its "B", since the load is always in the center for balancing it! Examiner report says that student chose C cause they thought that balance is shared!

 

[asd]

Its "B", since the load is always in the center for balancing it! Examiner report says that student chose C cause they thought that balance is shared!

Isnt the answer D?

 

[convent2012]

s05 P1
6 , 8 , 11 , 20 and 32??

 

[Fallen316]

Its "B", since the load is always in the center for balancing it! Examiner report says that student chose C cause they thought that balance is shared!

the answer's D
http://www.xtremepapers.com/papers/...onal O Level/Physics (5054)/5054_w09_ms_1.pdf

 

[Fallen316]

s05 P1
6 , 8 , 11 , 20 and 32??

6) ant-clockwise moment = clockwise moment --> F*(0.75+0.75) = 150*0.75 , OPTION A
8) uptil 10 the extension is uniform, but after ten its not so OPTION C
11) use E=mc^2 , OPTION D
20) v=f*lamda --> 1.5 , then use v=distance/time , OPTION C

 

[asd]

Question for you guys, designed by myself
A bicycle moves round a turn with a constant speed. What two statements from the following explain the force acting on the bicycle and its direction of acceleration?
1 Since the speed is constant, there is no force acting on the cycle.
2 Since the speed is constant, there is no acceleration.
3 A force acts on the cycle towards the center of the round turn.
4 Acceleration acts towards the center of the round turn.
5 Acceleration and force both act perpendicularly to each other with acceleration being tangent to the round turn and force towards the center.

A) 1 and 2
B) 3 and 5
C) 2 and 3
D) 3 and 4

 

[asd]

6) ant-clockwise moment = clockwise moment --> F*(0.75+0.75) = 150*0.75 , OPTION A
8) uptil 10 the extension is uniform, but after ten its not so OPTION C
11) use E=mc^2 , OPTION D
20) v=f*lamda --> 1.5 , then use v=distance/time , OPTION C

and guys E=mc^2 is no longer in our syllabus !

 

[convent2012]

6) ant-clockwise moment = clockwise moment --> F*(0.75+0.75) = 150*0.75 , OPTION A
8) uptil 10 the extension is uniform, but after ten its not so OPTION C
11) use E=mc^2 , OPTION D
20) v=f*lamda --> 1.5 , then use v=distance/time , OPTION C

thanks

 

[asd]

C

Umm any more guesses?? Mayedah ashiqbal khizer shahab Spidey21

Question for you guys, designed by myself
A bicycle moves round a turn with a constant speed. What two statements from the following explain the force acting on the bicycle and its direction of acceleration?
1 Since the speed is constant, there is no force acting on the cycle.
2 Since the speed is constant, there is no acceleration.
3 A force acts on the cycle towards the center of the round turn.
4 Acceleration acts towards the center of the round turn.
5 Acceleration and force both act perpendicularly to each other with acceleration being tangent to the round turn and force towards the center.

A) 1 and 2
B) 3 and 5
C) 2 and 3
D) 3 and 4

 

[convent2012]

and guys E=mc^2 is no longer in our syllabus !

yes its not in syllabus !

 

[Fallen316]

Umm any more guesses?? Mayedah ashiqbal khizer shahab Spidey21

wait , no , its B 3 and 5.
i did not read the question carefully

 

[Spidey21]

Umm any more guesses?? Mayedah ashiqbal khizer shahab Spidey21

c

 

[asd]

Should I tell the answer? Well i actually wanted ashiqbal to answer it too..wanted to see what he could come up with..

 

[malay]

Question for you guys, designed by myself
A bicycle moves round a turn with a constant speed. What two statements from the following explain the force acting on the bicycle and its direction of acceleration?
1 Since the speed is constant, there is no force acting on the cycle.
2 Since the speed is constant, there is no acceleration.
3 A force acts on the cycle towards the center of the round turn.
4 Acceleration acts towards the center of the round turn.
5 Acceleration and force both act perpendicularly to each other with acceleration being tangent to the round turn and force towards the center.

A) 1 and 2
B) 3 and 5
C) 2 and 3
D) 3 and 4

D

 

[asd]

D

Correct :O
It's not B/C. D is the answer.
And malay , explanation ?

 

[malay]

Correct :O
It's not B/C. D is the answer.
And malay , explanation ?

all rules that apply to circular motion

 

[khizer shahab]

Umm any more guesses?? Mayedah ashiqbal khizer shahab Spidey21

i would go with option C my guess

 

[asd]

i would go with option C my guess

answer is D

all rules that apply to circular motion

What are the rules? Just want to make sure you didnt make a guess.

 

[malay]

answer is D

What are the rules? Just want to make sure you didnt make a guess.

here is the detailed explanation...for those who made a guess

HAHAHAA... DAT AWKWARD MOMENT WHEN HATERS OF PHYSICS R ABLE TO GIVE RIGHT ANSWER