Physics: Post your doubts here!

[Ayesha_m01]

A ig

sorry what?

 

[hellodjfos;s'ff]

View attachment 64193
its B... how?
and why not C

There's no legit reasoning for this. The most you can do is use a few numbers to test out which equation is correct.

 

[hellodjfos;s'ff]

You guys asked lots of questions over the last couple of pages and I can't do them all... just tell me which tough ones you want explained as soon as possible.

 

[Ayesha_m01]

There's no legit reasoning for this. The most you can do is use a few numbers to test out which equation is correct.

hmmm... may God bless you...

 

[dwightedknight]

I pray I don't get a D this time too. Best of luck to everyone.

 

[hellodjfos;s'ff]

Yeah good luck to all

 

[Ayesha_m01]

ummm its D???

 

[Ayesha_m01]

ANS is C.... can someone show me the stepss

 

[hellodjfos;s'ff]

View attachment 64194 ummm its D???

For equilibrium, clockwise moments=anticlockwise moments
20(0.4)=10(0.6)+100(0.1)
8=16
You can clearly see that there is a lack of moment for clockwise, so the 20N weight must be placed towards the right side of the pivot. Also, there's a lack of 8Nm moment, so the 20N weight must have a moment of 8Nm.
8=20*D
D=8/20=0.4 m
This means that the extra 20N must be placed 0.4 m from the pivot to the right. This position is D

 

[hellodjfos;s'ff]

View attachment 64195
ANS is C.... can someone show me the stepss

Use the formula we use in maths mechanics paper. Wd by object-wd by air resistance=KE gain-GPE loss

 

[Hisham Khan]

gl lul

 

[Ebrahim12]

Answer is C
Why is D right but not C?

 

[Hisham Khan]

Paper was kinda tough and ok at the same time.
Wasthe displacement time graph like this?

 

[Tom Sewage]

View attachment 64195
ANS is C.... can someone show me the stepss

work done= GPE-KE
F*h= mgh - 0.5mv*2
F= mgh divide by h - 0.5mv*2 divide by h
F= mg - 0.5mv*2 divide by h
F= m ( g - 0.5v*2divide by h)

 

[DentedBend]

It was soon difficult.

How did it go for people finding hardest ever math p22 paper piss easy?

 

[DentedBend]

It was soon difficult.

How did it go for people finding hardest ever math p22 paper piss easy?

 

[hellodjfos;s'ff]

Paper was kinda tough and ok at the same time.
Wasthe displacement time graph like this?
View attachment 64197

That was the speed time graph shape for one of the questions. The displacement time graph for question was a reflection of this graph you made

 

[hellodjfos;s'ff]

Paper was relatively easier to previous summer papers. There were many repeat questions...

 

[hellodjfos;s'ff]

Paper was kinda tough and ok at the same time.
Wasthe displacement time graph like this?
View attachment 64197

Which questions were tough for you?

 

[Mts.99]

What was the shape of graph of semi conducting diode?