if an object is moving in a circle why doesnt it accelerate towards the centre if there is a resultant force and how does it move in a circle if the resultant force is pointing towards the centre? i mean doesnt it just move towards the centre?? How does it change direction only and not speed while a resultant force acting on it??
2006-09-06 04:47:39 · 9 answers · asked by I need Answers 5 in Science & Mathematics ➔ Physics
no such thing as centrifugal force i know...
2006-09-06 05:14:02 · update #1
one more thing is massed measured in gm or kgm for the equation Centripetal accelleration= (mv2/r)??
2006-09-06 05:21:08 · update #2
It does accelerate towards the center, but since it is already moving, it has momentum. If it was motionless and accelerated towards the center, then it would move closer to the center, but as it is, the force is just enough to keep the object in its orbit.
Imagine a ball with a string attached to it. Now imagine you're swinging the ball around in a circle above your head. The only force acting on the ball is the string, and the only direction the string can pull the ball is towards the center. The string represents centripital force acting on the ball.
2006-09-06 04:53:35 · answer #1 · answered by 006 6 · 0⤊ 1⤋
Newton's First Law states that "an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by a force.
Therefore, if there is no external force on the object, it should continue on a straight path.
If you now put a force perpendular to the direction of motion on the object, the object's path will bend. If the force is constant, the path will be circular. This force is called the "centripetal force" and it always point towards the center of the circular path.
2006-09-06 12:34:00 · answer #2 · answered by Kitiany 5 · 0⤊ 0⤋
We have to isolate the system and consider all the forces acting on it. Let us consider a weight tied to a string which is being moved in a circular path. What are the forces here.
1 weight of the body.
2 centrifugal force force acting away from center
3 tension in the string
How is the system balanced in dynamic equilibrium? now the tension in the string can be resolved in to two components. One component balances weight and the other centrifugal force. So there is no resultant force.(Otherwise it will accelerate in the direction of force).That is why it is in uniform circular motion. String constrains it to move Ina circle. I hope it is now clear and all queries stand answered.
2006-09-06 12:05:13 · answer #3 · answered by openpsychy 6 · 0⤊ 0⤋
Hi. The centripetal force is resistive only. Kind of like asking why a bridge doesn't jump up when a truck goes over it.
2006-09-06 11:52:10 · answer #4 · answered by Cirric 7 · 0⤊ 1⤋
in centrietal force the resultant is vector is zero
2006-09-06 12:16:02 · answer #5 · answered by jon k 1 · 0⤊ 0⤋
centrifugal force ?
2006-09-06 11:49:39 · answer #6 · answered by ? 7 · 0⤊ 3⤋
It is "Centrifugal".
As for your question, go to the link and learn.
2006-09-06 11:50:07 · answer #7 · answered by docscholl 6 · 0⤊ 4⤋
cuz GOD said so...I'm trying out to be a Christian
2006-09-06 11:51:17 · answer #8 · answered by Anonymous · 0⤊ 2⤋
Because it does.................. be satisfied.............
2006-09-06 11:49:50 · answer #9 · answered by thomasrobinsonantonio 7 · 0⤊ 3⤋