Physics What is Centripetal Force? Detailed!

The centripetal force is the force required to point to the center of curvature (the center of the circle when moving in a circle) to make a particle (or object) move in a curve. When an object moves in a circular motion, the external force pointing along the radius towards the center of the circle (or the component of the external force pointing towards the center of the circle along the radius) is called the centripetal force, also known as the normal force. It is a centripetal force that is provided or acted by an external force.

In addition, the centripetal force in the sense of group cohesion is a unity of opposites that combines the command authority of the group leader and the attitude of staying down.

Centripetal force in a nutshell.

Centripetal force. The term can be divided into centripetal force in the physical sense and centripetal force in the sense of mass cohesion from two different perspectives. Centripetal force in the sense of physics.

Centripetal force formula.

F-direction = mr2 = mv2r

mvω4π^2mr/t^2

4π^2mrf^2

4π^2n^2mr

The centripetal force is an artificially created force, not an actual force, so it cannot be said to be affected by the centripetal force, but a certain force to provide the centripetal force of the object. As for the formula upstairs, it's all written, so I won't ...... itAnother point to note is that the direction of the centripetal force must be directed towards the center of the circle, and the magnitude is the force pointing towards the center of the circle minus the force that deviates from the center of the circle, if there is no force that happens to be in this direction, then the force needs to be decomposed, and the high school part knows that these are enough ......Electromagnetic fields will also be used in a later chapter.

To give you a simple explanation: the centripetal force generally occurs when the object is moving in a circular motion. That is to say:

The reason why the physics of circular motion can do circular motion is because it is affected by the centripetal force, which can be literally understood as: the object in circular motion is affected by a non-equilibrium force, and the direction of this force is always directed towards the center of the circle, so it is called "centripetal force"!

Summary. For example, there is a circle that rotates around the center of the circle.

Then the angular velocities of the points on this circle are equal.

The linear velocity of the points above this circle that are equal to the center of the circle is equal.

If the angular velocity of this circle is a (unit: radians, seconds).

If the length of a point on a circle is l, then the linear velocity v of this point

al about the physics of centripetal force.

Hello, please wait.

The gravitational force of an object mg when it slides to the highest point of an orbit its pressure on the orbit is 3 4mg ask it what is the centripetal force at this time.

Why is the angular velocity of A the same as B, the radius of B is larger than A, so B slides first than A, and this is why.

For example, there is a circle that rotates around the center of the circle. Then the angular velocities of the points on this circle are equal. The linear velocity of the points above this circle that are equal to the center of the circle is equal.

Addendum: If the conveyor belt is connected to two flywheels, the radius of flywheel 1 is r1 and the radius of flywheel 2 is r2; The linear velocity of each point at the outer edge of the flywheel 1 is a, and the linear velocity of each point at the outer edge of the flywheel 2 is b; The angular velocity of flywheel 1 is a, and the angular velocity of flywheel 2 is b, then the linear velocity: a=b; Angular velocity:

a/b=r2/r1

I'm asking why B moves first than A, and according to the formula f mw2r shouldn't be B's son, so he needs more force than B, so why does B move first?

Because the radius of b is larger than a, the position of b is more rounded.

Why is it sleek, and the contact surface is different?

Yes, the radius is different, and the contact surface is also different.

The term centripetal force is an abstract concept, not a concrete scientific concept. The centripetal force can be any kind of force such as tension, elasticity, gravity, friction, etc., or it can be the resultant force or component force of several forces.

For example, when pulling a ball with a rope in a uniform circular motion, the pulling force of the rope is a centripetal force. When the planets revolve around the Sun, the cohesion is the centripetal force. When a car turns, the resultant force of gravity and supporting force is the centripetal force.

The centripetal force is in the opposite direction to the centrifugal force.

When the centripetal force is greater than the centrifugal force, the curvature increases;

When the centripetal force is less than the centrifugal force, the curvature decreases;

When the centripetal force is equal to the centrifugal force, the curvature does not change.

The centripetal force formula is f=(mv 2)r and f=mrw 2, I won't talk about the derivation of this formula, let's give it to you in layman's language, I hope you understand better.

f=(mv^2)r

where f is the centripetal force. What is the centripetal force? In layman's terms, it is the force required to keep an object in a circular motion without flying out in a tangential direction. There are three parameters in this formula: m, v, r. How to understand it?

Let me give you an example:

There is a car passing through an arch bridge, the mass of the car is m, the speed is v, and the radius of the arch bridge is rThe car has to drive over the arch bridge at a certain speed (which is part of the circular motion) without flying. What are the requirements?

Look at the formula, the larger m, the bigger f. The larger the v, the greater the f. That is to say, if the mass m of the car is larger, the greater the inertia when driving, and the easier it is to fly off the ground when crossing the arch bridge.

The faster the car is driven, the easier it is for the car to fly. At this time, the greater the centripetal force f is required, that is, if the centripetal force is too small, the heavy, fast car will break off the ground and fly out in the tangential direction when crossing the arch bridge.

Looking at the formula again, the smaller r is, the greater f is, which is to say. The smaller the radius r of the arch bridge, the greater the arc, think about it, compared to the horizontal ground, when the arch bridge is particularly bent, is it easier for the car to fly? The centripetal force f required is also greater.

Note: The centripetal force is not a force directly experienced by an object, but a force that an object does to maintain a circular motion"Yes"force. In this example, the car is subjected to only 2 forces, gravity and the bridge-to-car support force.

Gravity minus support is equal to the car"Yes"centripetal force. Different cars, different speeds, and different bridge radii will have different support forces. As a result"Gravity - Support = Centripetal Force Required"It's not the same.

I want to say this in the hope that it will deepen your understanding.

As for the formula f=mrw 2, it is deduced from the first formula.

First of all, the definition of centripetal force is as follows: the force required to make a particle (or object) move in a curvilinear motion towards the center of curvature (which is the center of the circle when moving in a circle).

In understanding, the trajectory of the object must be bent in the direction of the combined external force, this principle tells us that when the resultant force of the object is not collinear with the velocity, then the curvilinear motion is done, then the resultant external force is of course a vector, which can be decomposed, decomposed along the direction of velocity and vertical velocity, the vertical velocity direction is called centripetal force, also called normal force, and the direction along the velocity is called tangential force, and the centripetal force always points to the center of the curvature of the curve. Please pay attention to the landlord, the direction of the centripetal force has been changing, and it will inevitably change the force, even if the uniform circular motion is also changing. The centripetal force is artificially defined, not like the sub-properties and the field force (gravity, electric field force, etc.), elastic force, friction force, the landlord may understand here that there will be deviations.

In high school physics, we often encounter such forces, such as the gravitational force on the motion of celestial bodies, the electrostatic force on the movement of microscopic electrons around the nucleus, the Lorentz force on the moving charge in the magnetic field, and so on, as long as the curve is made, the force pointing to the center of the circle is called centripetal force.

The centripetal force is the combined force directed towards the center of the circle (center of curvature) when the object moves along a circumferential or curvilinear orbit, and is named after the effect. This effect can be provided by elastic force, gravity, etc., or by the resultant force of several forces or their components. Due to the combined effect of gravity and the elastic force provided by the inner wall of the balloon, a centripetal force is provided for the coin, allowing the coin to move in a circular motion.

To give you a simple explanation.

The centripetal force generally occurs when the object is moving in a circular motion.

That is to say, the reason why the physics of circular motion can do circular motion is because it is affected by the centripetal force, which can be literally understood as: the object in circular motion is affected by a non-equilibrium force, and the direction of this force is always directed towards the center of the circle.

So call it.

Centripetal force.

The energy balance can solve the final velocity equal, and I will help you analyze the convex and concave situation.

Force analysis, you can get a component of the concave gravity to offset the frictional force, and at the same time provide as a driving force, (there is a component and centripetal force in one direction, this force is useless for solving the problem), this component provides power, you can judge that the car is doing acceleration movement when it is descending, the same force analysis, and then the uniform deceleration process, and then the uniform speed movement on the horizontal road.

Similarly, the force analysis is first uniform on the convex.

Then reduce evenly. Then add evenly.

Finally homogeneous. The above is the force relation for preparation.

Let's talk about the similarities and differences between the two above. (The level pavement is the same, not to mention).

The distance of the concave and convex is the same, and the friction force is just the opposite, one is the maximum positive direction to the maximum negative direction, and the other is the maximum negative direction to the maximum positive direction, and the direction is self-determined, so it is not added, which is the maximum positive direction to the maximum negative direction. The judgeable average frictional force is the same, and the work done by f*s=frictional force is the same. (The energy balance yields the same velocity).

Let's talk about the biggest difference between the two to reach the midpoint of the time is not the same, this is also to solve the problem to give the difference, the initial velocity and the end velocity are the same, but in the concave is the first acceleration and then deceleration, the same analysis of the convex is the first deceleration and then acceleration, you can know that the average speed on the concave is concave, simply put, with the initial velocity as a reference, the velocity in the concave is greater than the initial velocity, and the velocity in the convex is less than the initial velocity, because the final velocity is the same, you can know that the speed of the two cars when they reach the end of the concave and convex point reaches the same.

In this process, the distance is the same, the average speed is concave, so the time = distance speed, you can know that the car walking on the concave road takes less time, so that the concave car first arrives in city B.

First of all, the object is not subjected to centripetal force, the centripetal force is the resultant force experienced by the object, which is the resultant force that provides the object to do centripetal motion, and gravity, to say the direct point, is the pressure of the object on the earth's surface, and the object on the equator is forced: the earth's gravitational force, the supporting force, the resultant force of these two forces is the centripetal force, and the support force is equal to gravity, and the direction is opposite, according to the formula of centripetal force, it can be obtained that the centripetal force of the object at the equator is the largest, and the gravitational force of the earth is the same, so the supporting force is relatively small, that is, the gravity force is small.

Hope it helps.