How was Mechanics Paper 42!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[saadgujjar]

gt wuld be 37

 

[saadgujjar]

Did we hav to show that the energy ie ke=o or just show that the speed is same ??

ke is zero

 

[pakiboy]

Guyz plz tell me the ans. Of q7 last part!!!
I dnt knw why many think that it was difficult

 

[saadgujjar]

i shoe kinetic energy 0 and then wrote at both point spped is zero ,i think i will los 1 mark,,am i right??????????

 

[saadgujjar]

Guyz plz tell me the ans. Of q7 last part!!!
I dnt knw why many think that it was difficult

0.47 100% correct

 

[AdeelRox]

here are the answeres to what I got
Ans.1 coefficient of friction=0.8; a=2.55ms^-2
Ans.2 workdone against resistance=750J
Ans.3 tension in AP was 13 and in PB was 20
Ans.4 S=13m; v=5.66; S/2 and s at T/2 were both 3.25
Ans.5. P=20, v=3.33
Ans.6 attempted only parts i and ii which are simple left the third part blank
Ans.7 a=5.85; v=2.65; got the distance wrong I guess just calculated the distance of A after STRING BECAME SLACK: IT WAS 1.43
It would be really apreciable if you world spot my mistakes and tell me how many marks I will loose in q.7
and that how many marks can I get. Thanks in advance

 

[pakiboy]

0.47 100% correct

0.47 100% correct

I wrote 0.475( 3 sig. Fig.)

 

[mania _ manal]

I dun thnk they asked tht show that the k.e is o i thnk we can do either way by showing that the speed is same and also by showing that ke=0 am i right ??

 

[tanixx]

i attempted ques 3 all correct only some decimal mistake ki hai that is why all of my ans got divided by 10 like 1.3 istead of 13.any idea how many marks will be deducted

 

[talha196]

guys which area we had to shade in q6 part 2

 

[workaholic]

guys which area we had to shade in q6 part 2

I shaded the whole graph........Dont think its right....

 

[tanixx]

guys which area we had to shade in q6 part 2

between time 20 and 26

 

[tanixx]

here are the answeres to what I got
Ans.1 coefficient of friction=0.8; a=2.55ms^-2
Ans.2 workdone against resistance=750J
Ans.3 tension in AP was 13 and in PB was 20
Ans.4 S=13m; v=5.66; S/2 and s at T/2 were both 3.25
Ans.5. P=20, v=3.33
Ans.6 attempted only parts i and ii which are simple left the third part blank
Ans.7 a=5.85; v=2.65; got the distance wrong I guess just calculated the distance of A after STRING BECAME SLACK: IT WAS 1.43
It would be really apreciable if you world spot my mistakes and tell me how many marks I will loose in q.7
and that how many marks can I get. Thanks in advance

around 8

 

[Your-Blood]

here are the answeres to what I got
Ans.1 coefficient of friction=0.8; a=2.55ms^-2
Ans.2 workdone against resistance=750J
Ans.3 tension in AP was 13 and in PB was 20
Ans.4 S=13m; v=5.66; S/2 and s at T/2 were both 3.25
Ans.5. P=20, v=3.33
Ans.6 attempted only parts i and ii which are simple left the third part blank
Ans.7 a=5.85; v=2.65; got the distance wrong I guess just calculated the distance of A after STRING BECAME SLACK: IT WAS 1.43
It would be really apreciable if you world spot my mistakes and tell me how many marks I will loose in q.7
and that how many marks can I get. Thanks in advance

Ans.5
V = 33.3 not 3.33 you might have write wrong here but would have done correct in paper
Ans.7
a and v are correct but last part is incorrect.

 

[saadgujjar]

What was angle in ques statment in q 1

 

[saadgujjar]

Plz tell me statment of q1

 

[saadgujjar]

Coficent of friction was 0.833????
Plz tell

 

[Jiyad Ahsan]

0.47 100% correct

i got o.48 which i rounded to o.5m in the last step

 

[tanixx]

30

 

[Your-Blood]

Coficent of friction was 0.833????
Plz tell

coefficient 25 / 30= 0.8