physics doubts VERY URGENT!!!!!!!!!!!!

[halosh92]

 an isolated body can be a given a displacement or a rotation. what is the result of applying a couple?
a) displacement
b) rotaion
c) displacement and rotation
d) neither

[A.T]

couple can surely rotate a body.

[halosh92]

physics AS cie
2009 june
q2 b

[astarmathsandphysics]

but which paper

[halosh92]

but which paper

ah sorry ya paper 2
question 2
the entire question not just part b

[astarmathsandphysics]

a)positive v - moving forward negative v - moving backwards
b)i)m(v-u)=1.2(-0.8-4)=-5.76
ii)Force=change in momentum/time=5.76/(2.6-1.=7.2N
c)mAuA+mSuS=mAvA+mBvB
1.2*4+0=1.2*-0.8+3.6vS so (4.8+0.96)/3.6=1.6m/s
loss in KE=1/2mAvA^2 -1/2mBuB^2-1/2mAuA^2=1/2*1.2*4^2-1/2*1.2*0.8^2-1/2*3.6*1.6^2=9.6-0.385-4.608>0 so inelastic

[halosh92]

a)positive v - moving forward negative v - moving backwards
b)i)m(v-u)=1.2(-0.8-4)=-5.76
ii)Force=change in momentum/time=5.76/(2.6-1.=7.2N
c)mAuA+mSuS=mAvA+mBvB
1.2*4+0=1.2*-0.8+3.6vS so (4.8+0.96)/3.6=1.6m/s
loss in KE=1/2mAvA^2 -1/2mBuB^2-1/2mAuA^2=1/2*1.2*4^2-1/2*1.2*0.8^2-1/2*3.6*1.6^2=9.6-0.385-4.608>0 so inelastic

thx aloot
but wats the basic general formula for K.E ?

[astarmathsandphysics]

KE=1/2mv^2

[halosh92]

 what is maxima and minima in the waves chapter

[halosh92]

same paper
2009 june paper 2
q5 the whole question

q7 ..plz expalin wat do they mean by exactly BETWEEN??

and for the minima and maxima is there a formula??

[astarmathsandphysics]

Home in few hours

[halosh92]

Home in few hours

okay but plzz i need today i have my mock tomorrow
thxxx

[astarmathsandphysics]

When I post like that I am reminding myself  to answer asap

[astarmathsandphysics]

q5 here https://studentforums.biz/index.php/topic,6323.0.html

By in between they mean the resistance between the points

[AS panic attack]

is any one doin AS edexcel physics
i need extra resources preferably notes related to unit 2
Thanks