physics mcq help needed! urgent!

[[Spy]]

thankyouuuu so much both of u.
may june 2007
Q7
Q10
thx ^^

Q7) as vector V has to equal vector U+X then final velocity V= Initial velocity U + X
if you look at the equation of motion v=u+at, then you'll see that simply, x is at

[[Spy]]

Q10) since F=ma
and a=(v-u)/t

then F= m(v-u) all /t
m(v-u) is equal to the change in momentum there fore F=momentum/time
and since its asking for force BETWEEN time t1 and t2 you have to include a time difference, and therefore answer is B

[halosh92]

thankyouuuuuuuuuuu

[cashem'up]

came across a question in june 2002 q3
Which formula could be correct for the speed v of ocean waves in terms of the density ? of seawater,
the acceleration of free fall g, the depth h of the ocean and the wavelength ??
A : root g lambda
B root g/h
C root rowgh
D root g/row

[[Spy]]

thankyouuuuuuuuuuu

no problemm

[nid404]

came across a question in june 2002 q3
Which formula could be correct for the speed v of ocean waves in terms of the density ? of seawater,
the acceleration of free fall g, the depth h of the ocean and the wavelength ??
A : root g?
B root g/h
C root ?gh
D root g/?

what's the ?

[[Spy]]

what's the ?

row, density sign

[halosh92]

2009 nov
Q12

[princess12]

it is for igcse
tell me yes or no

[nid404]

lol princess....not ig...A levels

[nid404]

guys gimme some time ill get back

[princess12]

what is ur name

[nid404]

what is ur name

huh? 

[[Spy]]

2009 nov
Q12

for variant 1...


i personally find this question difficult and time consuming, so here's an easier way

R1 and R2 HAVE to be equal because they are both vertical and they have the same masses connected to them...when we come to the T's, they cant be equal because you have changed the angles at which they are positioned and therefore the answer which meets those requirments is B


examiners actually said that students will find an easier way of doing questions rather than deriving long stepped equations such as teachers (A)

[Saladin]

huh? 

Her name is Queen Nandita Ramakrishna the third.