What is Centripetal: Definition and 1000 Discussions
A centripetal force (from Latin centrum, "center" and petere, "to seek") is a force that makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path. Isaac Newton described it as "a force by which bodies are drawn or impelled, or in any way tend, towards a point as to a centre". In Newtonian mechanics, gravity provides the centripetal force causing astronomical orbits.
One common example involving centripetal force is the case in which a body moves with uniform speed along a circular path. The centripetal force is directed at right angles to the motion and also along the radius towards the centre of the circular path. The mathematical description was derived in 1659 by the Dutch physicist Christiaan Huygens.
We're doing a lab on centripetal force where we swing a mass on a string over our heads. The string passes through a glass sleeve and has masses suspended at the bottom of the string like this...http://www.batesville.k12.in.us/Physics/PhyNet/Mechanics/Circular%20Motion/labs/cf_and_speed.htm"...
an athlete swings a 6.18kg ball horizontally on the end of a rope. The ball moves in a circle of radius 1.03m at an angular speed of 0.736 rev/s.
what is the tangential speed of the ball? Answer in units of m/s
WHAT is angular speed? and how would you solve t his?
thanx so much
For the Doc...JK...some more questions using Centripetal Force
A motorcycle has a constant speed of 23.1 m/s as it passes over the top of a hill whose radius of curvature is 172 m. The mass of the motorcycle and driver is 364 kg. Find the magnitude of (a) the centripetal force and (b) the...
I need some help with centripetal acceleration.
why when an object is whirling in a vertical circle,it must have a centripetal acceleration larger than 'g' in order for it to get to the top of the circle?
what if I give it just enough speed to get to the top(so when it gets to the top,it's...
Neutron stars represent the final stage of life for some massive stars. Typically, they have radii of 10 km. Determine the magnitude of the centripetal acceleration for a piece of neutron star matter on the star surface at the equator (so the matter moves in a circle of radius 10km). Assume...
Anyone know how to do this?
An astronaut is rotated in a horizontal centrifuge at a radius of 8.0 m.
(a) What is the astronaut's speed if the centripetal acceleration is 7.0g?
(b) How many revolutions per minute are required to produce this acceleration?
(c) What...
Okay, I need help with this question. It is killing me! :confused:
A circular drum is spinning round and round. A person is on the wall of the drum and there is no floor beneath him. If the drum has a radius of 2.4m and takes 2.5s to comlete a revoltion, what is the coefficient of friction...
ok so I've got a problem i cannot figure out and i know I'm skipping some simple step, so could someone please help me with the following question:
Estimate the force a person must exert on a string attached to a 0.190 kg ball to make the ball revolve in a horizontal circle of radius 0.600 m...
The cornering performance of an automobile is evaluated on a skidpad, where the maximum speed that a car can maintain around a circular path on a dry, flat surface is measured. Then the centripetal acceleration is calculated as a multiple of "g", the free-fall acceleration due to gravity at the...
It's my belief that if some one was at the equator or the south pole there weight might be differernt
Sum of F = m a = mg- N
a = v^2/r
at the pole the distance from person to rotational axis is 0 so a= 0 and then mg = N
On the equator the velocity can be calculated from 24 hours to go...
If you had a piece of matter which was loosly held together by gravitational interaction spinning on an axis and the centripetal force being produced was larger than the gravitational force holding the matter together would the matter that has become separate due to the centrapetal force still...
After reading in specialized Physics books and different articles, I’m still thinking about gyroscopical precession. I understand everything about angular momentum, torques…, but if center of masses makes a circular movement, Where does it provide centripetal force? Could it be for the axe...
Can anyone explain how centripetal force is involved in a golf swing, i understand that it is one force keeping the club from flying out of your hands, but what else. THis is not a homework question i am just curious. (Had to specify because of the thread above)
Iam doing on In this laboratory, you will investigate the centripetal acceleration of a horizontally rotating object. lab report.
on this lab they asking one question ...
Would it be possible to get the string holding the rubber stopper to be PERFECTLY HORIZONTAL during this experiment...
A roller-caster vechicle has a mass of 500 kg when fully loaded with passengers (Fig P7.28) (a) If the vechile has a speed of 20.0 m/s at point A, what is the force of the track on the vehicle at this point? (b) What is the maximum speed the vehicle can have at point B in order for gravity to...
A roller-caster vechicle has a mass of 500 kg when fully loaded with passengers (Fig p7.28) (a) If the vechile has a speed of 20.0 m/s at point A, what is the force of the track on the vehicle at this point? (b) What is the maximum speed the vehicle can have at point B in order for gravity to...
Hi, I just recently posted this on the astrophysics forum but thought it would probably not quite fit so i decided to move it here.
Hi, this is my first post. I have been trying to find an answer out of my own interest but is unable to do so. while searching I found this wonderful website. I...
I was just thinking that whether changes have any speed.
Suppose we have a system in which a bodyA is rotating around an other body B through centripetal force. If B gets an instantaneous hit so that its position changes. Then what will be the speed of change or effect or whatever with which...
Hey i was just wondering if anyone would care to take a look at my lab write up and see if I am missing anything or any pointers and such thanks.
the basis of the experment is to compare the results of a spinning pendulum as slow aws possible when at two different masses the string length...
We recently did an experiment in lab on centripetal acceleration. We used a spring mass mechanism and used the data we collected to compute the centripetal force. We then had to hang the spring mechanism on a stand then add weight to stretch the spring to the same index point and calculate the...
Hello, I know that there are two possible formulas to solve for radius. You can use (mv^2)/r ,or, (m4pir^2)/T^2. Now, the question is asking when the radius is trippled, the Centripital force is...?
Using the first equation, I come out with 1/3. Using the second equation, I come out with 9...
Hi Everyone! I've been working on this Physics problem for the last week and I still can not figure it out! I'm sure I'm missing some very basic concept, but I'm not sure how to proceed:
An Australian bushman hunts kangaroos with the following weapon - a heavy rock is tied to one end of a...
Astronauts use a centrifuge to simulate the acceleration of a rocket launch. The centrifuge takes 40.0 s to speed up from rest to its top speed of 1 rotation every 1.30 s. The astronaut is strapped into a seat 5.60 m from the axis.What is the astronaut's tangential acceleration during the first...
What I'm doing seems like it should work, but I can't seem to get it right. I'm sure I'm doing the math right, but I have a feeling I'm answering something that's not being asked. I would just like some help on setting up the equation right.
A car starts from rest on a flat circular track...
Centripetal force is directed towards the circle, but is centripetal force always involved when objects go in circle?If I put a toy car on ice and drive it around in circle with my hand, then obviously force my hand exerted was directed along the path(circle) and not towards center of circle...
The question and information given is -
"The formula for the centripetal acceleration experienced by a body moving at speed v in a circle of radius r is ac = v squared / r
A small mass m slides without friction along a loop-the-loop track. The circular loop has radius R. The mass starts...
I have set up an equation like this:
v= r x omega
mu x m x g = m v^2 /r
but I didn't get the answer, which is 15.7.
Is the setting right? If not, can anyone show me the right steps?
thx!
I am really in a jam, I have no idea if I solved this correctly or not, it is due Monday morning 8:00am /eastern time.
Here is the question:
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 28m/s, the block hangs vertically down. But...
i don't quite understand the difference between the two. i know centripetal means towards the middle and centrifugal goes out but i can't quite relate that to the problems.
for example, if you are twirling a ball on a string above your head in a circle, the centripetal acceleration points...
:confused: Given: r(Earth)=6.37*10^6 m
m(earth)=5.98*10^24 kg
r(moon)=1.74*10^6m
g=9.8 m/s^2
G=6.67259*10^-11 Nm^2/kg^2
Calculate the speed of a 97.4kg person at the equator.
do u...
Here's a picture http://img215.imageshack.us/my.php?image=physics6ry.png
A .10kg ball is on a string in vertical circular motion with a radius .80 meters and the whole system is above the ground .20 meters At the top the tangential velocity is 6.0m/s.
I'm wondering if these are correct...
a racing car is traveling on a circular course of radius 641m at a speed such that it makes 1.7 rev in 1 minute. THe mass of the car is 1990kg. what is the centripetal force acting on the car?
CF=ma=mass*acceleration
a=V^2/r
how do you find v?
A 40.0 kg child on a Ferris wheel rotates four times each minute and the wheel has a radius of 9.0 m.
What force does the seat exert on the child when the child is halfway between the top and bottom?
The answer is 397 N which is 5 N more than the weight of the child, but I have not idea...
Question 1
A conical pendulum consists of a string of length 1.2 m and a bob of mass 0.41 kg. The string makes an angle of 21° with the vertical. Calculate the tension in the string, in N.
iam not sure wat to do here if
l\omega{}^2 = \frac{g}{\cos\phi}
then i use
T=ml\omega{}^2 to get the...
A motorcyclist is approaching a hump-backed bridge, as shown in the diagram. The bridge forms part of a circle of radius r = 14.4 m. The combined mass of the motorcycle and rider is 141 kg. Calculate the maximum speed in m s-1 at which the rider could travel without leaving the road at the top...
1. Which of the following statements best applies to an object moving with uniform circular motion?(Answer: B)
A. Acceleration is zero.
B. Acceleration is directed outward.
C. Acceleration is tangent to the path.
D. Magnitude of acceleration is constant.
I thought the answer was D but how...
I did this experiment on centripetal forces, where we rolled a ball onto a turntable and it left dots at equal intervals of time.
For every dot I was asked to measure the component of its position (from the center) parallel to its track (the perpendicular disance, along the path, between the...
This problem is KILLING ME!
The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle (r = 10.8 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel...
How do you find the place when the ball is about to "swing" out?
A ball is attached to a vein, which has max tension of 300N; and Hercules is swinging the vein above his head. The length from vein to ball is .8meters. The ball has mass of 1.2kg..
How do you find the velocity of the ball...
Im doing a Centripetal force lab in which the problem is too find out the relationships between the centripetal force, and the frequency, speed, mass and radius of an objet.
I just need some re-assurance in my answers.
1.)What type of relationship exists between Centripetal force and frequency...
One question says "It has been said that centripetal force is is not a unique force. Outline what a centripetal force is as well as three (explained) examples of what is meant by this statement.(5 marks)" Here is my theory:
Newtons first law states that an object in motion stays in motion...
"A mass of 3.900 kg is suspended from a 1.450 m long string. It revolves in a horizontal circle.
The tangential speed of the mass is 3.247 m/s. Calculate the angle between the string and the vertical (in degrees)."
Here is a diagram, labelling angle theta I'm supposed to solve for...
Calculating Centripetal Force?!? (car moving in circle on a sloped road)
Hi guyz,
i have problem with this IB standard level mechanics question:
here is the link 2 the question: (it is from an International Bacalaureatte examination)...
hey evr1...i have been trying to do this quest...but somehow can't get it...any help is really appreciated..thnx
a child swings a yoyo of weight mg in a horizontal circle such tht the cord makes an angle of 30 with the vertical. find the centripetal acceleration of the yoyo. (g=10m/s/s)...
hey evr1...i have been trying to do this quest...but somehow can't get it...any help is really appreciated..thnx
a child swings a yoyo of weight mg in a horizontal circle such tht the cord makes an angle of 30 with the vertical. find the centripetal acceleration of the yoyo. (g=10m/s/s)...
Hello,
I am having the worst time figuring out how to solve this problem:
A student build and calibrates an acclerometer, which she uses to determine the speed of her car around a certain unbanked highway curve. The accelerometer is a plumb bob with a prtractor that she attaches to the roof...
a small ball of mass 38g is suspended from a string a length 59cm, and whirled in a circle lying in the horizontal plane. The acceleration of gravity is 9.8m/s2. if the string makes an angle of 31o with the vertical, find the centripetal froce experienced by the ball.
here's the diagram:(the...
In a "rotor-ride" at a carnival, people are rotated in a cylindrically walled "room." The room radius is 4.6 m, and the rotation frequency is .5 revolutions per second when the floor drops out. What is the minimum coefficient of static friction so that the people will not slip down?
I am...
A small cube of mass m is placed on the inside of a funnel rotating about a vertical axis at a constant rate of w revolutions per second. The wall of the funnel makes an angle theta with the horizontal. The coefficient of static friction between cube and funnel is u and the center of the cube is...