All Mechanics DOUBTS HERE!!!

[Uchia]

this one plz its urgent question 7

[Igcseboy]

jan 2010 question 6 d.... plzzz

[astarmathsandphysics]

q7

[astarmathsandphysics]

jan 2010 question 6 d.... plzzz
before A hits It accelerates at g/4 for 1.2s
s=1/2at^2=1/2*g/4*1.2^2=0.18g
When A hits floor, it and B are travelling with speedv=at=g/4*1.2=0.3g
Now B moves freely under gravity
v^2=u^2+2as
0=(0.3g)^2+2*-g*s
s=0.045g
height reached=0.18g+0.045g=0.225g

[georgianna]

has anyone done the M1 mock paper
http://www.srepapmaxeeeerf.org/A%20Level/Maths/Edexcel/M1/M1%20Mock.pdf
how do you get 8103.2 for 5c??
I only got 7280

[Uchia]

yeah i solved that question many times and i went to conclusion that they made a mistake in there calculations even my teacher said the same thing. There answer seem very weird

[Uchia]

hey guys plz help me in my doubt june 01 question 7

[astarmathsandphysics]

For the M1 mock paper

speed of both togeter is 5.6*78/84=5.2
deceleration=5.2/0.06=87


use F=ma to get R-84g=84*87 so R=84g+86*87

[astarmathsandphysics]

hey guys plz help me in my doubt june 01 question 7

[Uchia]

thanks sir

[Uchia]

how did you know that you need to add 6j in part a

[Igcseboy]

jan 2010 question 6 d.... plzzz
before A hits It accelerates at g/4 for 1.2s
s=1/2at^2=1/2*g/4*1.2^2=0.18g
When A hits floor, it and B are travelling with speedv=at=g/4*1.2=0.3g
Now B moves freely under gravity
v^2=u^2+2as
0=(0.3g)^2+2*-g*s
s=0.045g
height reached=0.18g+0.045g=0.225g

but its different in the markscheme :S:S:S

[perrychan527]

M1 Jan 08 6d plzz
dont understd the question and marking. thx..

[Saladin]

M1 Jan 08 6d plzz
dont understd the question and marking. thx..

answering now.

[Saladin]

I am going to have to answer the whole question, so please, it may take a while.