Revolution Now!
Welcome,
Guest
. Please
login
or
register
.
Have you missed your
activation email
?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length.
News:
New servers, hooraaaay! More bandwidth, more power.
Home
Help
Calendar
Login
Register
IGCSE/GCSE/O & A Level/IB/University Student Forum
»
Qualification
»
GCE AS & A2 Level
»
Subject Doubts
»
Math
»
m1 relly fast question
« previous
next »
Print
Pages: [
1
]
Go Down
Author
Topic: m1 relly fast question (Read 865 times)
7ooD
SF Geek
Posts: 427
Reputation: 713
Gender:
m1 relly fast question
«
on:
March 24, 2010, 12:16:29 am »
ok i got the question and the solution but just a part i dnt understand
the question says :
a body of mass 2kd is held in the limiting equilibrium on a rough plane inclined at 20 degrees to the horizontal by a horizontal force x. the coefficient of friction between the body and the plane is 0.2. modeling the body as a particle find x when the body is on the point of slipping a)up the plane b) down the plane
for this part i attached the solution or the way to solve it
the one i cnt solve is
the force in the previous question is now replaced by a force y at an angle of 45 degrees to the horizontal. find y when the body is on the point of slipping
a) up the plane b) down the plane
the answers should be a)43N b)3.67N
Logged
pimpin ain't dead it just moved to the web
Saladin
The Samurai
Honorary Member
SF V.I.P
Posts: 6530
Reputation: 59719
Gender:
I believe in those who believe in me
Re: m1 relly fast question
«
Reply #1 on:
March 24, 2010, 04:46:36 am »
Is this question from the Edexcel M1 book, and if so, please tell me the chapter number and question number.
Logged
astarmathsandphysics
SF Overlord
Posts: 11271
Reputation: 65534
Gender:
Free the exam papers!
Re: m1 relly fast question
«
Reply #2 on:
March 24, 2010, 07:30:08 am »
There is more than one way for a force to act at 45 degrees - it could act above the horizontal or below the horizontal. Which one is this?
Logged
7ooD
SF Geek
Posts: 427
Reputation: 713
Gender:
Re: m1 relly fast question
«
Reply #3 on:
March 24, 2010, 10:29:24 am »
chp 4 ex 4e q 5 and 6 astar thats wat is written in the question :d
Logged
pimpin ain't dead it just moved to the web
astarmathsandphysics
SF Overlord
Posts: 11271
Reputation: 65534
Gender:
Free the exam papers!
Re: m1 relly fast question
«
Reply #4 on:
March 24, 2010, 02:40:13 pm »
res perp to plane
R-2gcos25-Ycos25=0 (1)
parallel to plane Y sin25-2gsin20-0.2R=0 (1)+5*(2)
Y(5sin25-cos25)-(2gcos25=10gsin25)=0
Y=42.49
cant scan a diagram now sorry.
res perp to plane
res perp to plane
R-2gcos25-Ycos25=0 (1)
parallel to plane Y sin25-2gsin20+0.2R=0 (1)-5*(2)
Y(-5sin25-cos25)+(10gsin20-2gcos25)=0
Y=-5.1 ie up
Logged
Print
Pages: [
1
]
Go Up
« previous
next »
IGCSE/GCSE/O & A Level/IB/University Student Forum
»
Qualification
»
GCE AS & A2 Level
»
Subject Doubts
»
Math
»
m1 relly fast question