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![[Post New]](/templates/default/images/icon_minipost_new.gif) 21 Jul 2008 16:39:11 IST
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why the direction of centripetal force is towards the centre
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22 Jul 2008 00:45:23 IST
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coz d direction of centripetal acc is 2wrds d centre and acc and force r interrelated 
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don't walk as if u rule d world
walk as if u dont care who rules d world
-this is knw as attitude
B who u r and say wat u feel ......
coz those who mind don't matter ........
and those who matter dont mind ......... :)
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22 Jul 2008 08:06:17 IST
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For rotating any body 2 types of forces act on it - Centripetal and Centrifugal.
So, it is by definition - Centripetal force is a type of force which acts 2wards centre
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22 Jul 2008 09:27:47 IST
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deedee is right...coz the direction of radial acceleration is towards the centre ....so if acceleration is there then force must also there....according to 2nd law of motion,,,,...therefore the direction of centripetal force is towards the centre.....and this force is required for motion in a circlar path....while centrifugal force is a pseudo force ...which act away from centre....
hope i help u plz rate me...
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if i helped u plzzzzz rate me,,,,,,, |
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22 Jul 2008 09:38:57 IST
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Mukesh, you've got it wrong....... this is not supposed to be a question....
The force that acts towards the center in circular motion is called centripetal force...... that's how it can be defined... so, it's something like a definition..you cannot question a definition
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22 Jul 2008 09:39:34 IST
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If it doesn't act towards the centre, it cannot be called centripetal force..
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22 Jul 2008 09:42:08 IST
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why this is not supposed to be a question....tat was his doubt...and many answers have given to him.....
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<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
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<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
if i helped u plzzzzz rate me,,,,,,, |
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22 Jul 2008 10:38:49 IST
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Centripetal force is inferred from the trajectory of the object, without regard for how the path was arrived at (regardless of the origin of the forces involved). The studies of trajectories and the forces they imply is kinematics, while the study of which motions result from given physical forces is kinetics, the other branch of dynamics.
Supposing the analysis of a trajectory (kinematics) has concluded that for an object to follow the observed path a centripetal force is required, one might reasonably ask the (kinetic) question: "Where is the centripetal force coming from?"
For a satellite in orbit around a planet, the centripetal force is supplied by the gravitational attraction between the satellite and the planet, and acts toward the center of mass of the two objects. For an object at the end of a rope rotating about a vertical axis, the centripetal force is the horizontal component of the tension of the rope, which acts towards the center of mass between the axis of rotation and the rotating object. For a spinning object, internal tensile stress is the centripetal force that holds the object together in one piece.
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22 Jul 2008 14:22:41 IST
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http://www.goiit.com/posts/list/mechanics-why-the-direction-of-centripetal-force-is-towards-75029.htm
See the link above and u will understand.
Rate me, if useful.
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VAIBHAV |
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22 Jul 2008 22:12:01 IST
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in a simple manner the definition would be - centripetal force is the force acting on the body due to an agency(which can be any reference point,centre)at the centre on the body towards the centre.so in centripetal force there is always a medium at the centre.Eg- you are spinning a ball tied to a rope then your hand will become the agency.And it is a real force.
hope u are satisfied.
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