What is Centripetal force: Definition and 561 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.
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)...
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...
Overall, I've done pretty well on this physics homework (which is due 10-13 @ 11PM Central), but these two questions are bugging the hell out of me.
1. An amusement park ride consists of a large vertical cylinder that spins about its axis fast enough that any person inside is held up...
I need help! I've tried so many methods but am still coming up blank.
"The same car now travels on a straight track and goes over a hill with radius 154m at the top. What is the maximum speed that the car can go over the hill without leaving the road? (m/s)"
Important Details:
Mass =...
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...
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...
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)
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...
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...
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...
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...
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?
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...
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...
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)...
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...
Hey guys -
Here is a problem I have been working on... I've tried several things, I think I'm pretty close...
Stone has a mass of 7e-3 kg and is wedged into the tread of a tire. Coefficient of static friction between each side of tread channel is 0.74. When the tire surface is rotating at 18...
The problem states : A car of mass 1450. kg is moving at a speed of 24.0 m/s on a 90.0 m radius curve. Find the centripetal force?
Can anyone give me any suggestions on how to go about finding centripetal force?
I have a question on what it is I might be doing wrong here... I've tried this answer in the grader and it is wrong...
At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats facing the axis, their backs against the outer...
When a top is spinning, it won't fall down to the land as long as its angular speed is large.
I can understand this phenomena from the Torque-Angular momentum perspective.
Howevr, i can understand it from F=ma 's perspective.
Sine its center of mass is making a circular motion around the...
A car is rounding a 515 m frictionless curve in the highway. If the curve is banked at an angle of 12.0 degrees, what is the maximum speed of the car? (1.5)
I achieved an answer of 32.39 m/s or 116.604 km/h . I used an incline plain to find that Fc = mgsin12 and used that to find the answer...
an object mass of .5kb revovles uniformly in cirlce horizontal frictionless surface. it is attached by .75 m cord to pin set in surface. if object makes 2 complete revolujtions per second, find its speed and its centripetal force
mg = m(v2/r)
gr = v2
v = sq root of gr
v = sq root of...
well first off, here's the problem:
A car can negotiate an unbanked curve safely at a certain maximum speed when the coefficient of static friction between the tires and the ground is 0.997. At what angle should the same curve be banked for the car to negotiate the curve safely at the same...
how long would it take a spinning 1 kg mass to go from 1m to 100m radius at 100m/s by switching tension from 10000N to 100N?
the object is spinning and i would like to know how many revolutions would it take to go from a radius of 1 m to a radius of 100 m starting to count in the moment the...
hello
do any of u guys knw what is the relationship between the centripetal force and frequency, mass, speed, and radius of a rotating object?
thx a bunch :tongue2:
Hi,
can someone please point me in a direction. I need to explain WHY "The centripetal force is proportional to the mass and to the radius and proportional to the square of the frequency."
We did the spinning lab, and now I need to do a discussion.
Thanks.
I feel like there's not enough information to solve this:
A child slides down a slide with a 29 degree incline, and at the bottom her speed is precisely two-thirds what it would have been if the slide had been frictionless. Calculate the coeffieicnt of kinetic friction between the slide and...
I have been having trouble with this problem for quite awhile now, and I am wondering if anyone could offer some help...
I figured out part one...that the x direction forces must equal each other (mg sin theta = m*v^2/R) but i am completely lost on the second part. Number 6. Thanks!
5...
I have to find the centripetal force and velocity of an object being swung around on a string that is attached to a weight (starting at 200 grams up to 1100 grams). The length of the string (radius) that is swinging the object is .5 meters. I have the times for each mass (200g-1100g). How...
How would I find the tension of a rope that is attached to an object being swung around in a circle? If I find the centripetal force would that be the same thing as the tension?
I have a physics lab on centripetal force and I'm stuck on an anaylsis question. The lab requires me to have a piece of string with masses on opposite ends threaded through a tube. The mass at the bottom should hang, while the mass on the top are swung in circular motion. The question asks, if...
in uniform centipetal motion, the centipetal accleration points towards the center, what about the centipetal force? What direction does this force point?
Hi,
I am trying to find the speed it takes to open a yo-yo clutch, against a spring, to its maximum, the problem I am stuck on is whether you have to use F cos 90 - θ to get the centripetal force or if you have to do this in reverse eg. Fc = F / cos 90 - θ. I ask this because if you start...
a small object is placed 10cm from the center of a phonograph turntable. it is observed to remain on the table when it rotates at 33 1/3 rev/min but slides off when it rotates at 45 rev/min. Calculate the centripetal force.
if anyone has any ideas what so ever they are greatly appreciated...
I have this question for physics and I can't figure it out! A person who weighs 35.0 kg rides a theme park ride. If the ride starts at rest and reaches angular speed of 1 radian/sec in 14sec. The angular acceleration would be .071 rad/sec^2 (i think-haha). Now if the angular speed remains...
sth about centripetal force. pls help! ><
i got some problem about centripetal force. in this experiment, " http://www.smcc.edu.hk/phy/Experiments.files/Centripetal%20Force.doc "
my hand apply a horizontal force, to give the velocity 'ω' to the stopper thing. when i decompose ω into vectors...
A tennis ball connected to a long piece of string is swang around in a horizontal circle above the head of the pupil.
the pupil feels that there is a tension in the string and argues that for equilibrium there must be an outward "centrifugal force acting on the ball.critisize this argument and...
Hey guys/gals, I'm new here and new to physics, but I love it all. Ok, for some of you, this may be a walk in the park, but personally, I don't think this is an incredibly easy problem for someone who's never taken Physics before this semester. I tried many different approaches, and have come...
A stone has a mass of 3.0*10^-3 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.72. When the tire surface is rotating at 20 m/s, the stone flies out of the tread. The...