Pls can someone help me to solve this question, am practicing for my exams.

  • Thread starter smokee
  • Start date
  • #1
smokee
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A 5 metre long ladder in equilibrium leans against a wall, touching it 4 metres above
the ground. The ladder’s mass is uniformly distributed and is equal to 10kg. An 80kg
man stands on the centre rung of the ladder. Assume the wall is frictionless but that
the ground can exert a frictional force. Calculate the forces exerted on the ladder by
the wall and the ground.


And does anyone knows any thing about bonding and anti-bonding order in molecular orbitals...

Thanks alot

smokee
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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welcome to pf!

hi smokee! welcome to pf! :wink:

(pleeease don't give two different threads the same title! :redface:)

draw the ladder with all the forces acting on it

write equations for the components of force in the x and y directions, and for the moments of force about some suitable point …

what do you get? :smile:
 
  • #3
smokee
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ere thanks a lot tiny-tim

please i still don't get much about it, see what i did, i found the distance on the ground from the bottom of the wall to the bottom of the ladder, its 3 metres then i calculated the angle at which the ladder is leaning on the wall...its 53.13 degress...
 
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  • #4
tiny-tim
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Homework Helper
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ok, that's the angle

now write equations for the components of force in the x and y directions, and for the moments of force about some suitable point …

what do you get? :smile:
 
  • #5
smokee
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0
y component is 706.32 N
x component is 529.74 N

@tiny-tim, do u fink dats correct?

thanks a lot for helpin
 
  • #6
Evo
Mentor
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y component is 706.32 N
x component is 529.74 N

@tiny-tim, do u fink dats correct?

thanks a lot for helpin
Stop the silly writing and please read the guidelines.
 
  • #7
smokee
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that is a little bit mean, calling my writing silly, you can say that in a more better way and i will still understand you.

Well i will stop :L
 
  • #8
tiny-tim
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smokee, I agree with Evo … stop the silly writing and please read the guidelines :redface:
y component is 706.32 N
x component is 529.74 N

@tiny-tim, do u fink dats correct?

i'll guess it's correct …

but if you want people to check your work, you need to show it …

write equations for the components of force in the x and y directions, and for the moments of force about some suitable point …

what do you get? :smile:
 

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