• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

AS Physics P1 MCQs Preparation Thread.

bloody_mary

bloody_mary

Messages
143
Reaction score
91
Points
28
Soldier313 said:
Can someone pls help with these?View attachment 13023View attachment 13024


ans is C for both of the qns

Capricedcapri abdullah ash bloody_mary
Click to expand...

ok first find intial speed and final speed so:

intial momentum = final momentum
mu = 2mv

so intial speed is u
and final speed [v] = u/2

intial KE 0.5mu^2
final KE = 0.5 *2m * (0.5u)^2 = 0.25mu^2

final KE/ intial KE = 0.25mu^2 / 0.5mu^2 = 0.5 intial KE so C

----------------------------------------------------------------------------------------

moment = force * perp distance
so resolve the forces
popdfn.png

so 2*cos40 = 0.459 = 0.46 so C
 
Soldier313

Soldier313

Messages
958
Reaction score
3,499
Points
253
bloody_mary said:
ok first find intial speed and final speed so:

intial momentum = final momentum
mu = 2mv

so intial speed is u
and final speed [v] = u/2

intial KE 0.5mu^2
final KE = 0.5 *2m * (0.5u)^2 = 0.25mu^2

final KE/ intial KE = 0.25mu^2 / 0.5mu^2 = 0.5 intial KE so C

----------------------------------------------------------------------------------------

moment = force * perp distance
so resolve the forces
View attachment 13026

so 2*cos40 = 0.459 = 0.46 so C
Click to expand...
thanx so much!:)
 
arlery

arlery

Messages
1,800
Reaction score
1,800
Points
173
MysteRyGiRl said:
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_ms_12.pdf
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_12.pdf
any1 there???? i need help hereee ppl
Q no 17, 26 and 31........
Click to expand...
In Q . 26
The x axis says time, hence XY represents the time period [the time taken by a wave to complete one wave form]
and the y axis says displacement and since X and Y are in the same position [on the y axis] they'll have the same displacement.
 
MysteRyGiRl

MysteRyGiRl

Messages
3,063
Reaction score
1,831
Points
173
arlery said:
In Q . 26
The x axis says time, hence XY represents the time period [the time taken by a wave to complete one wave form]
and the y axis says displacement and since X and Y are in the same position [on the y axis] they'll have the same displacement.
Click to expand...
just 1 question....arent da amplitudes same too?
 
arlery

arlery

Messages
1,800
Reaction score
1,800
Points
173
MysteRyGiRl said:
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_ms_12.pdf
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_12.pdf
any1 there???? i need help hereee ppl
Q no 17, 26 and 31........
Click to expand...
In Q 31, since the answer is B because a radial field is stronger and the arrows always point away from positive charge to negative charge. Since the particle is positively charged, moving it closer to the field will result in a stronger repulsive force.
 
You must log in or register to reply here.
Top