Physics Paper 1 question!

[oahmed64]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s12_qp_11.pdf
Q8 can someone answer me and with explanation please ?

 

[Nada_A97]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s12_qp_11.pdf
Q8 can someone answer me and with explanation please ?

As you see the force acting on the handle (right and left) are at different distances from the pivot and since momentum= force x distance.. the distance for the upper 100N is greater therefore the momentum is greater causing the handle to turn anti-clockwise

 

[oahmed64]

As you see the force acting on the handle (right and left) are at different distances from the pivot and since momentum= force x distance.. the distance for the upper 100N is greater therefore the momentum is greater causing the handle to turn anti-clockwise

whats the effect of the force that is acting downwards ?

 

[Nada_A97]

Did u do physics paper 1 today

I'm variant one so that's a no , did you?

 

[Nada_A97]

whats the effect of the force that is acting downwards ?

It's acting on the pivot and the pivot is applying a force back so they cancel out each other leaving the right and left forces to decide the direction the handle will turn

 

[Sapphire_26]

Main topics that came?

it covered the whole syllabus so just go through all the "basic" concepts.. and it will be easy

 

[Sapphire_26]

Any new questions? Or like tricky ones?

naahh nothing "tricky"
it was like all the same old physics past papers..
just go through basic concepts and it will be a breeze.. trust me

 

[rama kamal]

naahh nothing "tricky"
it was like all the same old physics past papers..
just go through basic concepts and it will be a breeze.. trust me

What is the answer to the work done and power of a car .. And graphs in choices what are your answers plzz say

 

[oahmed64]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s12_qp_12.pdf
Q34 dont we connect a fuse of 10A since the highest it could reach is 6A,but why is the answer D ?

 

[Abdul Kolonqui]

What is the answer to the work done and power of a car .. And graphs in choices what are your answers plzz say

what did you put?

 

[rama kamal]

D .. Wbu

 

[Abdul Kolonqui]

Same

 

[oahmed64]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w08_qp_1.pdf
Q8 the answer is C,how can u have equilibrium if the two forces are acting downwards?

 

[Al-Anoud]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w08_qp_1.pdf
Q8 the answer is C,how can u have equilibrium if the two forces are acting downwards?

how else can equilibrium happen?
forces always act downwards! dont understand wt ur trying to ask!

 

[Al-Anoud]

and oahmed64 u do now tht equilibrium is when thr is no resultant force right?

 

[oahmed64]

and oahmed64 u do now tht equilibrium is when thr is no resultant force right?

equilibrium is when anti clockwise moment is equal to clockwise moment and upward force is equal to downward,so how can it be possible if both of them are acting downwards?

 

[Al-Anoud]

equilibrium is when anti clockwise moment is equal to clockwise moment and upward force is equal to downward,so how can it be possible if both of them are acting downwards?

yess but u forgot.....when there is no resultant force! the anticlockwise IS equal to the clockwise thts y the rod is straight and horizontal!

 

[Al-Anoud]

and if u ever get confused in these kind of questions, dont look for the answer......try to cancel out the answers u r sure which wud be wrong!

 

[igcsephysicstutor]

this is a confusing question, because there would be a fourth force of the pivot on the handle, which would be upwards 100N, so yes the vertical forces will be balanced, and the turning effect (moment, NOT momentum) would turn the handle anti-clockwise. so answer C.

we have walkthroughs of most of the recent paper 1s here: http://igcsephysicstutor.com/tutorial-videos/exam-paper-walkthroughs.html - these may be helpful...

 

[Ali hussain-97]

Guys for the question about the thermal capacity? What was the answer? I chooses A because it was the smallest block.