Author Topic: Physics Question help !  (Read 1435 times)

Offline aiyla

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Physics Question help !
« on: October 05, 2009, 04:36:04 pm »
this question i dont know how to solve it .. can any one please help me out ?



http://i35.tinypic.com/wvrfv7.jpg
(thats the image if the above one is too small)

the question says " calculate the minimum force needed just to lift the spherical ball above the floor , the weight of the spherical ball is 50N
i did everything else on the drawing u can get the idea and the values required .

answer is F=26

the teacher said something about using equilibrium's second law .
sum of moment acting on the body= 0
clockwise moment = anti clockwise


can any one explain this question please ?
« Last Edit: October 05, 2009, 04:57:36 pm by aiyla »



nid404

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Re: Physics Question help !
« Reply #1 on: October 05, 2009, 05:15:43 pm »
kinda vague...astar will be able to help you

Offline astarmathsandphysics

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Re: Physics Question help !
« Reply #2 on: October 05, 2009, 07:10:25 pm »
Will answer it when i get home.

Offline aiyla

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Re: Physics Question help !
« Reply #3 on: October 05, 2009, 07:15:02 pm »
thanks alot <3



Offline astarmathsandphysics

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Re: Physics Question help !
« Reply #4 on: October 05, 2009, 09:01:01 pm »
see attached image.

Take moments about A.

Applied force*(10+15)=50*sqrt(175) so applied force =50*sqrt(175) /25 =26.46N

Offline aiyla

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Re: Physics Question help !
« Reply #5 on: October 05, 2009, 09:12:10 pm »
thanks astar, that was helpfull



Offline astarmathsandphysics

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Re: Physics Question help !
« Reply #6 on: October 05, 2009, 09:19:10 pm »
mo probs. Keep 'em coming