Centripetal force Definition and 558 Threads

Homework Statement Calculate the centripetal force required to rotate a 3Kg object in a circle at a radius of 3m at one revolution per second? Ok for some reason i find circular motion a real struggle i have come up with an answer for this question but looking for some reassurance i am on...

Homework Statement Please go to: http://web.dsbn.edu.on.ca/~andre.huyzers/FOV1-000DC3EC/FOV1-000DC3EE/Lab%20Centripetal%20Force%20.pdf?Plugin=Loft Evaluation Question (E) Homework Equations The Attempt at a Solution Well I was thinking that as the frequency of revolution of...

Homework Statement A particle of mass m kg lies on the top of a smooth sphere of radius 2 m. The sphere is fixed on a horizontal table at P. The particle is slightly displaced and slides down the sphere. The particle leaves the sphere at B and strikes the table at Q. Find (i) the speed...

An interesting thought just struck me and I wanted to confirm if it is correct. Do all objects (of fixed mass) need a particular magnitude of force to keep them moving in a circle, e.g: a ball will ALWAYS need a force of 10N to keep it moving in a circle If the speed increases then the radius...

Homework Statement Downward force is used to keep a car in contact with the track. The motion through the air produces a force ppd to direction of travel pushing the car ONTO the track. A racing car of mass 720 kg takes an unbanked corner of radius 550 m at a speed of 50 m/s The max...

Homework Statement Find the centripetal force required to rotate 6 kg object in a circle at a radius of 6m at one revolution per second. Homework Equations C.F. = mv2/r [b]3. The Attempt at a Solution [/b Circumference=2 pi r=2*3.14*6=37.68 C.F. = 6*(37.68)2/6=1419.78...

Homework Statement Determine the error in the calculated centripetal force, F (dynamic), for each value of r from the estimated error in the quantities m, r, and from the standard deviation from the mean of your three measurements of f. Derive the equation for the error using Rule # 2 for...

Homework Statement Say if you have water in the bucket and you spin it around really fast creating a vertically cricle. How come it won't fall on you when its at the top? Homework Equations The Attempt at a Solution

1. Homework Statement : Essentially it is a loop with a ramp leading to it. Find the height h the car would start from in order to complete the loop. Also find the speed the car would have to be at to complete the loop Your answer should be in terms of r. No friction 2. Homework Equations : I...

If the net sum of forces is zero , the object moves with constant velocity.(inertial frame) But , when this centripetal thing comes in Suppose we have only a force acting perpendicular to the motion of the body. then how does this centripetal force comes in , there are 4 fundamental forces...

If I have a string with a lump on the end and is being swung in a circle with a continuous angular velocity then I know that: F= m\frac{v^2}{r} or using angular velocity, F= m r \omega^2 But, is there a tangential force acting at the point of mass in its instantaneous direction, and if...

Homework Statement A ball is tied to an elastic string of length 8.0m and swung in a horizontal circle with a velocity if 0.8m/s. When a metallic object is tied to a rope of length 2.75m and swung in a horizontal circle, it makes 1 revolution in 2.9s. The ratio of the centripetal force in the...

Homework Statement A speed hump is installed. A 1800 kg car passes over it at 30km/h. The hump follows the arc of a circle with r=20.4 What force does the road exert on the car as the car passes the highest point of the hump? the answer is 1.15x10^4 N according to my professor and this random...

Text of the problem: Because the Earth rotates about its axis, a point on the equator experiences a centripetal acceleration of 0.033 7 m/s2, whereas a point at the poles experiences no centripetal acceleration. Assume the Earth is a uniform sphere and take g = 9.800 m/s2. (a) If a person at...

Homework Statement A man standing inside a cylinder rotating with a particular angular velocity ω could take his feet off the ground and stay 'glued' to the wall of the cylinder. Draw the free body diagram of the man. The Attempt at a Solution My question is how the gravitational force...

When there's magnetic field, a charged particle moves in a circle. I would like to ask why won't the circle goes smaller even when there's a force pointing inward (towards the center of the circle). Thank you!

Hi guys and gals, I have a robotics related engineering problem I need help with. So, for our robot we are building, it has a centripetal arm that launches a foam basketball. The arm is 2 foot in diameter rotating from the center with 3 pounds on each side (including projectile and...

Hi! I need help and please do not delete this! What I need help with i cannot put into the template provided. I am sorry but I need help with a lab report. PLEASE I AM BEGGING YOU TO NOT DELETE THIS BECAUSE IT DOES NOT FOLLOW THE TEMPLATE! I REALLY REALLY NEED HELP! I need to find the...

This might be silly question for some people, yet better to ask than don't know the answer :(. so the thing is , i know that centripetal force holds a thing to keep running on a path, but when i think of Earth and all those planet which surround it, the centripetal force is gravity right ? and...

Homework Statement Riders in a carnival ride stand with their backs against the wall of a circular room of diameter 8m. The room is spinning horizontally about an axis through its center at a rate of 45 rev/ min when the floor drops so that it no longer provides any support for the riders...

Note: This discussion question is from my University Textbook, as it so happens you can only get the solutions to half of the odd numbered exercise questions... Disclaimer: I have been trying to wrap my head around this answer for a good 5 hours now, so it's not like I'm coming here to be...

Homework Statement Your favourite physics teacher who is late for class attempts to swing from the roof of a 24-m high building to the bottom of an identical building using a 24m rope as shown in Figure 5. She starts from rest with the rope horizontal, but the rope will break if the tension...

Homework Statement This question relates centripetal acceleration and gravity. The general question is to determine the acceleration of gravity using centripetal force. A coin is tied to a string and swung in a circle over a person’s head. There is also a plastic tube attached to the string...

I think the force of friction should act to the left, toward the rotational axis. My physics teacher says that the force of friction is acting out of the page, so I am confused. Thanks!

Hi, I know that centripetal force for planetary motion is the same as the force of gravity between that satellite and planet. For example (I know these numbers may be completely unrealistic but just for the sake of easy calculation...) if the mass of the Earth is 1x10^30 kg and the mass of...

Homework Statement A pilot flies a loop-the-loop maneuver at constant speed. Two forces act on the pilot- the force due to gravity and the normal force of the seat pressing on him. Rank the largest to smallest normal forces on the pilot when [a. he is at the bottom of the loop right side up]...

I'm thinking about how this sphere would move down the ramp and through the loop at the bottom of the ramp. I'm mostly interested in what's going on at the very top point of the loop. If I were to draw a free-body diagram of the sphere at that point, what forces would be present? I'm guessing...

Homework Statement So in lab, we had this setup where we had a string, two masses, and a tube. We attached one of the masses, then put the string through the tube, and attached the other mass on the other end. Then, by holding the tube, we were to spin a mass above our heads and time how...

Hi, I am very confused. I have searched everywhere online and have drawn free-body diagrams, but I am still confused as to why static fricition, not kinetic friction, provides the centripetal force in a car moving in a circle. In addition, assuming that the centripetal force of a car...

Hello Forum, I think I understand what the centripetal force does: it is a force perpendicular to the velocity of the object, a force that does not cause changes in kinetic energy but only modifies the trajectory. I am not clear on this specific situation: object1 is rotating on a table. It...

A() 61 kg child stands at the rim of a merrygo-round of radius 1.05 m, rotating with an angular speed of 1.87 rad/s The acceleration of gravity is 9.8 m/s^2 What is the child’s centripetal acceleration? Answer in units of m/s What minimum force between her feet and the floor of the...

Homework Statement If a curve with a radius of 60m is properly banked for a car traveling at 60km/h (16.66m/s) with no friction, what must be the coefficient of friction if the car is not to skid when traveling at 90km/h (25m/s) Homework Equations mac = mv^2/r The Attempt at a...

Homework Statement A coin is placed 18cm from the axis of a rotating turntable of variable speeds. If the coefficient of friction is 0.68, what is the maximum r.p.m that the coin can handle before sliding off? Homework Equations This is basically what I need.. I know there's mv^2/r But...

Homework Statement A 1200 kg car travels around a curve banked at 42.5 degrees in a circular path of radius = 150m, but the ramp is only 55m long. The force of friction on the car is 9000N, calculate the speed of the car. So: radius = 150 m θ (angle the incline makes with the...

Homework Statement How do you calculate the mass from slope of a line T^2 on y-axis and 1/f on x axis?? Homework Equations 4π^2mr/fc The Attempt at a Solution I don't know how to attempt this. I have a data table and the graph has y=0.7385x-0.0254. Obviously 0.7385 is the slope...

Homework Statement Hello everybody, I have a question that is tied into my lab report regarding centripetal force. The question asks if the frequency of rotation were to increase how would the radius r and the centripetal force change? Homework Equations 2\pif = v/r rearrange for...

hi there i was looking at this video on utube and have two questions regarding it. at 1:02. the person starts to rotate the apparatus. my first question is that HOW CAN U DRAW THE FREE BODY DIAGRAM OF THE MASS ATTACH TO THE SPRING while its rotating? i know there is the mg downward from...

Homework Statement Consider the figure below, a ball of mass m=0.100 kg tied by a string of 0.100 m travels in a circular motion with 2 revolutions per second. Find the angle θ that keeps the ball stationary. Given: m = 0.100 kg, v = 2 rev/sec L = 0.100 m (radius?)...

The idea being that I have two particles of opposite charge (particles implying the mass is negligible relative to the electric forces at play). One is fixed at the center, the other orbits around at a fixed radius. How would I go about solving for the angular velocity required to keep this...

Homework Statement When the sliding along a horizontal circular path on the inside of a friction-free cone, the magnitude of the normal force (use the diagram) 1. is greater than mg, always. 2. is equal to mg. 3. may be greater than mg. 4. is less than mg, always. 5. may be less than...

Homework Statement The space shuttle releases a satellite into a circular orbit 555km above the earth how fast must the shuttle be moving when release occurs in m/s? Homework Equations V= square root ((GM)/r) r= 555000 G= 6.67 * 10^-11 -mass was not given so I am not sure how to plug it in...

A woman is riding a Jet Ski at a speed of 26 m/s and notices a seawall straight ahead. The farthest she can lean the craft in order to make a turn is 22°. This situation is like that of a car on a curve that is banked at an angle of 22°. If she tries to make the turn without slowing down, what...

Will you please tell me if my work is correct? My professor said to ask my TA for the even answers in prep for my quizzes on Fridays, but the TA told me there is no way to access even answers...somebody is not being honest. Anyhow, any help would be great. Thank you! In Figure 5.8 the man...

Homework Statement Two stars of mass m1 and m2 are in orbit around their center of mass. If 2m1=5m2, and their orbital period is 120Ms, calculate the mass of the larger star, given that the distance between their centers is 1400Gm. Homework Equations F=GmM/r2 The Attempt at a...

Homework Statement a person is standing stationairy on Earth (whilst it is rotating) there is a net force towards the centre of the earth. What would the free body diagram look like. Please could someone explain why thanks Homework Equations I know the formula for...

Homework Statement "If the coefficient of static friction between the block of mass m and the turntable is \mu_s, determine the maximum constant angular velocity of the platform without causing the block to slip." I'm actually using this problem to understand why I'm getting the wrong answer...

Homework Statement The centripetal force is given by F= (mv2) / r. If the mass is measured to be 2.8 +/- 0.1 kg, the velocity is 14 +/- 2 ms^-1, and the radius 8.0 +/- 0.2 m, find the force on the mass, including the uncertainty. Homework Equations F= (mv2) / r The Attempt at a...

Hi, I face some difficulties trying to solve the following problem: "You’re sitting in the passenger seat of the car, approaching a tight turn with a 10.0-meter radius. You know that the coefficient of static friction is 0.8 on this road (you use the coefficient of static friction...

Can you describe( graphically,like a diagram,or a picture) how a friction force plays the role of the centripetal force?For example, a car performing an uniform circular motion on a plane in a idela situation.The car will perform the turn because of friction forces between tyres and...

A motorcycle is traveling up one side of a hill and down the other side. The crest of the hill is a circular arc with a radius of 45.0 meters. Determine the maximum speed that the cycle can have while moving over the crest without losing contact with the road. Will somebody sound this...