What is the similarities of centrifugal and centripetal force?

Answer 1

Centripetal Force is more directed towards the center of the axis of rotation of

an object following an elliptical or circular path. Centrifugal Force is the force

that pulls away from the center because of the objects inertia.

Example: If you took a rock, tied it to a string, and swung it around, the force

from the center of the axis of rotation is centripetal force. The force that causes

the rock to pull away from the center, is centrifugal force. If you have ever been

in a fast moving car that sharply turns and you feel as if you are pulled to the

side, that too is centrifugal force caused by your inertia. The more mass the

more inertia.

this answer is very good

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But largely erroneous.

"Centrifugal" force doesn't exist. It's a make-believe, made-up thing, that's

not really there.

When the centripetal force suddenly shuts off, the object proceeds in a straight

line, in the direction it was going at the instant when the centripetal force stopped,

and naturally, the straight line takes it straight away from what used to be the

center of its motion. We see the object take off straight away from the former

center, and we say "Gee, there must be a force pulling it away from there." But

there isn't any.

That "force" that you think you feel when the car turns a corner and you get

pressed against the door, away from the curve ? That's just the tendency of

your body to want to keep moving in a straight line, and its reaction to the

centripetal force that the car-seat and the door are exerting on you in order

to make your body move in a curved path. There is no "centrifugal" force.

Answer 2

Centripetal force always points to the center of a circle.

Gravity is a centripetal force because it all leads to the center of the Earth. When you throw a Baseball on Earth, the baseball won't go very far because gravity is pulling it down.

Answer 3

Centrifugal (center fleeing) force is the scalar force pulling away from the origin, -cmDel.V = -cDel.P = -cp/r cos(P). The negative sign indicates away from origin.

Centrifugal force is a real force resulting from the vector derivative (Divergence) of the vector energy, cP, Momentum energy.

Centripetal (center seeking) force is the scalar force pushing towards the origin, mv2/r. Centripetal force is the real derivative of the Scalar/potential Energy.

A moving object with no force acting on it continues moving in a straight line. It

takes a force to bend it away from a straight path. As long as an external force

acts on the object and continues to point toward the same single point, the object

will move in a circular path, and the force is called a "centripetal force".

Now, hold onto your seat: "Centrifugal" force doesn't exist. It's a make-believe,

made-up thing, that's not really there.

When the centripetal force suddenly shuts off, the object proceeds in a straight

line, in the direction it was going at the instant when the centripetal force stopped,

and naturally, the straight line takes it straight away from what used to be the

center of its motion. We see the object take off straight away from the former

center, and we say "Gee, there must be a force pulling it away from there." But

there isn't any.

That "force" that you think you feel when the car turns a corner and you get

pressed against the door, away from the curve ? That's just the tendency of

your body to want to keep moving in a straight line, and its reaction to the

centripetal force that the car-seat and the door are exerting on you in order

to make your body move in a curved path. There is no "centrifugal" force.

Answer 4

Centrifugal force is a made up term. Centripedal force a force perpendicular to the direction of a spinning object at any given time. "Centrifugal force" is simply the force observed in a centrifuge.

In an example of the Earth's orbit, the Earth is being pushed away from the sun using centripedal force. This force is being opposed by the force of gravity. In an example of a string with a mass tied at the end spinning around a central point, the opposing force is the force of tension.

Answer 5

centripital acceleration (a) can be calculated from a v^2 / r, where v is velocity and r is radius, then centripetal force can be calculated by installing the result in

f m

• a, where m mass.

the combined equation is f m

• (v^2 / r)

Answer 6

Both have the same expression mv2 / r.

Centripetal force is the necessary force to keep a body moving along a curved path.

Centrifugal force is due to the inertia of the direction.

Answer 7

Centripetal force is equal to centrifugal force if the Condition of Continuity is required or there is Conservation of energy.

Answer above fails to address the false notion of "centrifugal force".

There is no such force. A mass that is forced to move in a circle (stone swung on the end of a rope) is constantly being "pulled" from the "natural" straight-line path caused by its momentum. This causes an acceleration: even at constant speed, the velocity (speed-direction value) is constantly changing.

The constant change of velocity is caused by a restoring force in the rope. This is a true force, the centripetal (towards-centre) force. It is opposing (and exactly equal to) the mass-acceleration product in the mass (Newton 2: force = mass x acceleration.

So we can answer the question:

If the object is being forced to move in a circle by the restraining (centripetal) force in the rope that exactly counteracts the mass-acceleration value in the mass, we have a system in equilibrium (the mass is neither moving away from the centre of its circle of motion, nor towards it).

Thus, we have Newton's Third Law "action and reaction are equal and opposite".

"Conservation of Energy" is not the critical issue here, nor is Condition of Continuity. It's plain, simple old Newtonian physics.

Answer 8

Forces are the first derivatives of energy. Total gravitational energy is W = -mGM/r + cP, where P is the momentum mV=P. The Momentum energy is cP..

The forces are F=[d/dr,Del][-mGM/r, cP] = [vp/r -cDel.P, cdP/dr + mGMR/r^3 + cDelxP]

the centripetal (center seeking) force is vp/r a scalar force. The centrifugal force (center fleeing) is cDel.P=-cp/r cos(PR). The centrifugal force is also a scalar force.

At continuity the the scalar force balance to zero and the orbit is stable, . vp/r = cp/r cos(PR) or v/c=cos(PR).

The centrifugal force is the Divergence of the vector energy. The curl of vector energy is the force the rotates the mass m. Newton and Einstein did not recognize the vector energy cP=cmV. People call this force inertia, it is the Momentum energy. If there is Momentum ,a vector, there will be Momentum energy, cP and Divergence and Curl of the Momentum energy giving Divergence and Curl forces.. The curl or Divergence may be zero; the Divergence cDel.P =0 when Momentum is perpendicular to the radius. The curl is zero when the Momentum is parallel to the radius, cDelxP=0.

If the Momentum is not a multiple of 90 degrees to the radius, there will be both Divergence and Curl forces.

Notice there are 5 forces, two scalar forces, centripetal and centrifugal and the tangent cdP/dr, teh gradient Del -mGM/r= mGMR/r^3 and the Curl cDelxP.

The centrifugal force is not fiction it is as real as centripetal force.

Answer 9

The best answer is: Because centripetal force exists, and is

a real force, whereas centrifugal force doesn't, and isn't.