Centripetal Definition and 1000 Threads

When doing problems involving centripetal force, using the equation: F = mv^2/r , is r the distance between the centers of the two masses or is it the distance between the surfaces?

Homework Statement A wheel of radius 1.0 m is rotating with a constant angular speed of 2.0 rad/s. What is the centripetal acceleration of a point on the wheel’s rim? A) 1.0 m/s2 B) 4.0 m/s2 C) 0.50 m/s2 D) 2.0 m/s2 Homework Equations Would it be v^2/r? The Attempt at a...

Homework Statement A 13500 N car traveling at 50.0 km/h rounds a curve of radius 2.00x10^2 m. Find the following: a). The centripetal acceleration of the car. b). The force that maintains centripetal acceleration c). the minmum coefficient of static friction between the tires and the road...

Homework Statement The problem states: Find the centripetal acceleration of a point on the Equator. Find the centripetal acceleration at North Pole, due to the rotation of Earth about its axis Homework Equations ac = v2/r The Attempt at a Solution Well I tried to make an attempt...

it's on centripetal force and gravitation problems.. wonderin if anyone can provide me answers such that i can compare mine here's the assignment http://www.geocities.com/cheemaharmeet/assignment.jpg mine are { 1. 8N; 2. 1.97 hr; 3. 7.9E3 m/s 4. 382.26 m, 5.49E3 N 5. 8E-10 N 6...

How is the Period proportional to the Radius. (The Period being how long it takes for 1 full revolution of an object) I am also assuming there is a tension force.

Homework Statement An automobile moves at constant speed over a hill with a radius of 18 m. At the top of the hill, the drivers notices that she barely remains in contact with the seat. find the speed of the vehicle. Homework Equations Using Newton's second lay, and centripetal force...

Homework Statement A 1.0kg ball is attached to a rigid vertical rod by the means of two massless strongs each 1.0m long. The strings are attached to the rod at points 1.0m apart. The system is rotating about the axis of the rod, both strings being taut and forming an equilateral triangle with...

I am currently doing a practical concerning centripetal motion and I am a bit confused. The attachment has the setup of the experiment. Now the aim of the experiment is to create a horizontal centripetal motion with plug. If we were to add more mass to the plastic bag would it increase...

Hi. When a plane travels in a vertical circular loop, what is the provider of the centripetal force, required to produce the circular motion? At the top of the loop, there is gravity acting towards the center of the circle, so id assume that this is part of it, but what about at the bottom...

Homework Statement What angular velocity would cause a centripetal acceleration of 3 g's if the radius were 2.5 m? i have a test 2moro on this stuff... yea i need to know =D thx Homework Equations i guess m(v^2)/r or mW^2r The Attempt at a Solution no idea. srry :confused:

HELP...new physical science student seeking to understand physics. Can you help me with this problem A race car goes around a level, circular track with a diameer of 1.00 km at a constant speed of 90.0 km/h. What is the car's centripetal acceleration in m/s2? Marla

Hi. This isn't a homework problem, but I am asking for the sake of adding to my understanding of the topic. In class, we have just begun uniform circular motion on the horizontal plane. Now, i understand that for an object to be accelerating (changing direction in this case), there needs...

THE PROBLEM: (my own words) For a rotating circle with radius 2.10cm, the centripetal acceleration on the rim must be 100g. In revolutions per minute, what is the rate of rotation required? MY SOLUTION: 1. Centripetal acceleration is given by a_c = \frac{v^2}{r} and so \frac{v^2}{0.021} =...

A chair is attached by a 9.0m long chain to the top of a tall rotating tower. The tower spins the chair and rider around at a rate of 1 Rev. every 4.0s. Max weight of the chair & rider is 150kg. You buy chain rated@3000N of tension. Will that chain be strong enough?

please help: The Bohr model of the hydrogen atom has the proton located in the nucleus with the electron orbiting it at a radius of 5.29 x 10^-11m. a- What force does the electron experience due to the proton? b- what is its centripetal acceleration i already figured out part a which is...

"An Earth satellite moves in a circular orbit 597 km above Earth's surface with a period of 96.42 min. What are (a) the speed and (b) the magnitude of the centripetal acceleration of the satellite?" Ok, so first I converted everything to standard units. I made a circle diagram with radius...

is centripetal force present in inertial and non-inertial frames?

Homework Statement A race car starts from rest on a circular track of radius 400m. The car's speed increases at the constant rate of .5m/s^2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, determine a) the speed of the race car, b) the distance...

Well, I was just browsing through this website:http://www.physicsclassroom.com/mmedia/circmot/rcd.html it explains stuff about the centripetal force, but how come for a rollercoaster, you add the normal force and gravity force to come up with the net force or the centripetal force? Could...

This question may sound ignorant. When it comes to physics, I guess you could say I'm physically challenged. Still, I would appreciate any and all help given. Assume a future, highly advanced human civilization built a spaceship at the edge of the galaxy. The ship slowly started accelerating...

Homework Statement It has been suggested that rotating cylinders about 10 mi long and 5 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration? Homework...

Does a rotating rigid disk, for example, feel centripetal acceleration at each point of its body? or more general: Is centripetal acceleration only for non-rigid bodies? (ball on a string, ex)?

Homework Statement In a "Rotor-ride" at a carnival, riders are pressed against the inside wall of a vertical cylinder 2.0m in radius rotating at a speed of 1.1 revolutions per second when the floor drops out. What minimum coefficient of friction is needed so a person won't slip down? Is this...

1. A mass attached to a 50-cm long string starts from rest and is rotated 40 times in 1.00 min before reaching a final angular speed. Determine the angular acceleration of the mass, assuming that it is constant. W = Delta Theta/Delta Time Average Acceleration = Delta W/Delta time W =...

1. A dog sits 1.50 meters from the center of a merry-go-round with an angular speed of 1.20 rad/s. If the magnitude of the force that maintains the dog's circular motion is 40.0 N, what is the dog's mass? 2. Fc = (mv^2) / r 3. We were provided with the answer "18.5" but I do NOT...

Is the direction of centripetal force of an object moving in a circle pointing to the center of the circular path?

Hey there. Say we have a roller coaster trail which is roughly circular. When the roller coaster reaches the top of the trail, then the only forces acting on it are the force of gravity, the centripetal force, and the normal force, which are all acting downwards. Thus, the net force acting...

How do you calculate the centripetal force in pendulums? THx

We are to design the track for an induction roller coaster. To create an inital thrill, we want each passenger to leave the loading point with acceleration g along the horzontal track. To increase the thrill, we also want that first section of track to form a circular arc, so that the...

Calculate the centripetal force on a 2000-kg automobile roudning a curve of 175 m radius at a speed of 50 km/h. ok so this Fc=mv^2/r i did 2000(50)(1000)(3600) / 175 but this was incorrect. the answer is 2.2x10^3 N the 1000x3600 was to convert the km/h to m/s and i think that's...

Hi again ^^. I worked to the best of my ability to solve my homework problem, but it's very hard and confusing me. I showed all of the work to the best of my knowledge, and I was hoping someone could check my work. I'm not necessarily looking for the answer as much as an explanation so that I...

I've been doing some practice force questions and there are a few I don't understand. I have the solutions to them, so my questions will be relatively short, but I just need to have some things cleared up. The first one: "A circus performer of weight W is walking along a 'high wire' as shown...

Can anybody please explain me the difference between "centripetal" and "radial"? I get stuck in distinguishing them! centripetal force, centripetal acceleration... radial force, radial acceleration... I also don't understand why they say that "In uniform circular motion, the difference...

:smile: An amusement park ride consists of a round room. Once you are placed against the outer wall, the room begins to spin. After the room attains a critical rotational speed, the floor drops out, but you remain against the wall. The radius of the room is 30m, and the coefficient of...

I'm having trouble coming up with a strategy for this problem. Any help is appreciated! "You are swinging a bucket (mass 1.00 kg) containing 2.00 kg of water at a constant angular speed in a vertical circular path (the path lies in a vertical plane) of radius 1.00 m. a.) What is the...

Any help would be greatly appreciated...:cry: It has been suggested that rotating cylinders about 10 mi long and 5.0 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall...

Hi there, I was wondering if anyone could help me with a centripetal motion question. "A cyclist competes in a one-lap race around a flat, circular course of radius r. Starting from rest and speeding up at a constant rate throughout the race, the cyclist covers the entire course in a time Δt...

Hey I am confused about how to find theta in this problem: A biker going 20 m/s on a frictionless, circular track of radius 12m banked at an angle of theta degrees I started by just finding the accel... v^2/r = 400/12 = 33.333 the mass does not matter because it cancels out so...

"The wheels of a certain roller coaster are both above and below the rails so that the car will not leave the rails. The mass supported by this particular wheel is 402 kg and the radius of this section of track is 70 m. What is the magnitude of the force that the track exerts on the wheel when...

first off, thanks for all the help. My physics book got taken when my car got broken into and my backpack was taken. I have an old book and my pages don't coencide with my homework. everyone has been a big help. with that,, i just have two final questions about centripetal force: 1. A...

A 0.50 kg ball that is tied to the end of a 1.0 m light cord is revolved in a horizontal plane with the cord making a 30° angle, with the vertical (See Fig. P7.52.) I managed to get my answer down to solving for theta however I don't know how to do the math: I solved for T = mg / cos(x)...

A particle of mass m slides down a fixed, frictionless sphere of radius R. starting from rest at the top. a. In terms of m, g, R. and theta, determine each of the following for the particle while it is sliding on the sphere. i. The kinetic energy of the particle ii. The centripetal...

Problem: The Earth orbits the sun once a year (3.16 x 10^7 s) in a nearly circular orbit of radius 1.5 x 10^11 m. With respect to the sun, determine (a) the angular speed of the earth, (b) the tangential speed of the earth, and (c) the magnitude and direction of the Earth's center centripetal...

hi I'm a new member in this forum and I'm taking physics(University level) grade 12...in one of our labs about the relationship between centripetal force and radius, we must use a constant centripetal force( we used 2N) and find the frequency in RPM for different radii, and this is what we got...

There is a clever kitchen gadget for drying lettuce leaves after you wash them. It consists of a cylindrical container mounted so that it can be rotated about its axis by turning a hand crank. The outer wall of the cylinder is perforated with small holes. You put the wet leaves in the container...

Hi, I was told about Centripetal Motion and learned some about rides at the fairs. There is one ride with chairs hanging by a chain in a circle that simply rotates at a certain speed without turning at any angle. Does anyone understand why all of the chairs move up at the same angle even though...

I have a few homework problems do tommorrow and I have tried and can't figure out these few problems. Thanks for the help. Oh and I don't just want the answers. I have those...I need help forming the equations. Thanks. 73. A curve of radius 60m is banked for a design speed of 100km/hr. If the...

Hey there. I took Physics B last year, but for some reason we never covered the banked turns when it comes to centripetal acceleration. So I need a bit of help on these two: A curve with a 100 m radius on a level road is banked at the correct angle for a speed of 16 m/s. If an automobile...

Hi, I have a question regarding centripetal acceleration that I'm not certain on how to solve. I was hoping if anyone may please help me out with this question. Thanks. Question: a) What is the magnitude of the centripetal acceleration of an object on Earth's equator due to the rotation of...