Sliding Definition and 716 Threads

Homework Statement A straight piece of conducting wire with mass M and length L is placed on a frictionless incline tilted at an angle theta from the horizontal. There is a uniform, vertical magnetic field vecB at all points (produced by an arrangement of magnets not shown in the figure)...

Homework Statement You push a block of lead across the floor, applying a horizontal force of 9 N. The block moves at a constant speed. The mass of the block is 1.5 kg and the heat capacity of lead is 130 J/(kg K). After pushing the block a distance of 20 m, you measure its temperature and find...

Homework Statement a ball started at a height of 12.5 meters and rolled to the edge of a roof which is at 7 meters. Using a^2+b^2=c^2 we know it rolled a distance of 8.14 meters on the roof because it rolled a horizontal distance of 6m and a vertical distance of 5.5m. Find the time it rolled...

[SOLVED] Sliding in Socks Homework Statement Suppose that the coefficient of friction between your feet and the floor, while wearing socks, is 0.250. Knowing this, you decide to get a running start and then slide across the floor. If your speed is 3.00 m/s when you start to slide, what...

Homework Statement A uniform solid cylinder (m=0.230 kg, of small radius) is at the top of a similar ramp, which has friction. The cylinder starts from rest and rolls down the ramp without sliding and goes around the loop. Find the speed of the cylinder at the top of the loop. Homework...

Homework Statement A student is pulling a 25 kg trunk up an incline that has an angle with the horizontal of 20 degrees. She has a strap tied to the trunk which is parallel to the surface of the incline. If the coefficient of kinetic friction between the incline and the trunk is 0.5 fine...

Homework Statement You are driving a 2090 kg car at a constant speed of 22.2 m/s along an icy, but straight and level road. While approaching a traffic light, it turns red. You slam on the breaks. Your wheels lock, the tires begin skidding, and the car slides to a halt in a distance of 64.9...

[SOLVED] Sphere: angle to begin sliding Given a small mass on a sphere. Coef of static friction is .49 what angle would begin sliding. I thought i would use inverse cos(.49/9.8) and i get 87 degrees but it is wrong any other equations i am missing?

A 5.0 g coin is placed 22 cm from the center of a turntable. The coin has static and kinetic coefficients of friction with the turntable surface of µs = 0.80 and µk = 0.50. What is the maximum rpm that the turntable could speed up to without the coin sliding off? m = .005 kg r = .22 m...

A 5.0 g coin is placed 22 cm from the center of a turntable. The coin has static and kinetic coefficients of friction with the turntable surface of µs = 0.80 and µk = 0.50. What is the maximum rpm that the turntable could speed up to without the coin sliding off? m = .005 kg r = .22 m µs = 0.8...

A slide loving pig slides down a certain 19° slide in twice the time it would take to slide down a frictionless 19° slide. What is the coefficient of kinetic friction between the pig and the slide? here is how i approached the problem: since on a slide i changed the x-axis going with the...

The question is: Two horizontal forces F1 and F2 act on a 1.8 kg disk that slides over frictionless ice, on which an xy coordinate system is laid out. Force F1 is in the negative direction of the x-axis and has a magnitude of 3.0 N. Force F2 has a magnitude of 9.0 N. The figure below gives...

Homework Statement A large package weighing 517 N is accelerated across a gym floor at 3 m/sec^2 because it is being pushed at a force of 285 N at 50 degrees to the floor. What is the normal force of the package? What is the coefficient of sliding friction between the package and the floor...

Homework Statement There is a 5.0kg block sliding 1.5m down an inclined plane 12 degrees from the horizontal. the coefficient of kinetic friction is 0.310. Whats is the work done on the block by friction and gravity? Homework Equations F=ma, W=fd, fk=uk*N The Attempt at a Solution...

Homework Statement A block of ice slides down a frictionless ramp at theta = 60 degrees while an ice worker pulls on the block (via a rope) with a constant force of 50.0 N. The block slides a distance d = 0.8m along the ramp and its kinetic energy increases by 128 J. (a) Calculate the work...

Homework Statement Part A: A box of mass m is sliding along a horizontal surface. The box leaves position x = 0 with speed v_0. The box is slowed by a constant frictional force until it comes to rest at position x = x_1. Find F_f, the magnitude of the average frictional force that...

Homework Statement A block of weight w sits on a frictionless inclined plane, which makes an angle (theta) with respect to the horizontal. A force of magnitude F, applied parallel to the incline, pulls the block up the plane at constant speed. 1)The block moves a distance up the incline...

Homework Statement A child on a toboggan slides down a hill with an acceleration of magnitude 1.5 m/s^2. If friction is negligible, what is the angle between the hill and the horizontal? a = 1.5 m/s^2 g = 9.8 m/s^2 The Attempt at a Solution Ok, there is no mass given so it it's a...

Homework Statement The velocity of a 2.10 kg block sliding down a frictionless inclined plane is found to be 1.13 m/s. 1.00 s later, it has a velocity of 4.13 m/s. What is the angle of the plane with respect to the horizontal? 2. The attempt at a solution I drew a diagram and...

Homework Statement A smooth ring of mass m can slide on a fixed horizontal rod.A string tied to the ring passes over a fixed pulley and carries a mass M(<m).At an instant the angle between the rod and the string is θ.Show that if the ring slides with a speed v,the block descends with a speed...

Homework Statement A block of ice with mass 2.00kg slides 0.750m down an inclined plane that slopes downward at an angle of 36.9degrees below the horizontal. f the block of ice starts from rest, what is its final speed? You can ignore friction. Homework Equations F=ma, trig...

Homework Statement A block of ice with mass 2.00kg slides 0.70m down an inclined plane that slopes downward at an angle of 30degrees below the horizontal. If the block of ice starts from rest, what is its final speed? Homework Equations W = 1/2(m)(v2)^2 - 1/2(m)(v1)^2 The Attempt at a...

Homework Statement Well I figured out the first problem I had posted so here's a new one :) If two objects of different masses are sliding along a frictionless surface at the same speed and they both slide of the same frictionless surface. which rises to a greater height? I want to say they...

A block starts from rest at a height of 4.7m on a fixed inclined plane tilted at 30 degrees. The coefficient of friction is 0.28. If the block continues to slide on the ground with the same coefficient of friction, how far will the block slide on the ground until coming to rest? [b]2. V =...

Homework Statement A person starts from rest at the top of a large frictionless spherical surface, and slides into the water below. At what angle (theta) does the person leave the surface? Then the book gives a "hint": (Hint: The person will lose contact with the surface when the Fn...

Homework Statement An object, a sphere or cylinder, is rolling down an incline and also slipping. How do you find the translational and angular speed? Does slipping decrease or increase the translational and rotational speeds? How so? Homework Equations The Attempt at a Solution

Golf Cart Questions Homework Statement Ms. Boylan on her 1750-kg cart is traveling at a constant speed of 8.5-m/s on a wet, straight, and slippery road. A mindless student steps out in from of the cart. The wheels lock and she begins skidding and slides to a halt in 12.0-m. What is the...

a ladder 4m long rests against a vertical wall. If the bottom of the ladder slides away from the wall at a speed of 30cm/s. How quickly is the top of the ladder sliding down the wall when the bottom of the ladder is 2m from the wall.

Homework Statement A turntable rotates at 78 rev/min A particle on the turntable is located 0.14 m from the center of the rotating turntable The particle on the turntable has a mass of 16 g. Calculate the force of friction which keeps it from sliding off Homework Equations f_s =...

a block slides along a horizontal plane at an initial velocity of 10m/sec. After sliding 4 meters it reaches a 35 degree incline and slides up the hill. the coefficient of kinetic friction is 0.4 for all surfaces. a) how fast is it going when it reaches the incline? b) how far up th incline...

I read this question a few days ago: Lets say that you have a line that goes from a point on the +y axis to a point on the +x axis with the length of L. There's an infinate amount of such lines, starting with a line that goes from (0,0) to (0,L) and ending with one that goes form (0,0) to...

Here's a question (not homework) that someone asked me a few days ago: you have a rod with length L and mass M that's leaning against a frictionless wall and makes a 30deg angle with the floor. what does the static friction have to be inorder for the stick to stay inequilibrium? What i did...

Homework Statement You are working for a shipping company. Your job is to stand at the bottom of a 8.0-m-long ramp that is inclined at 37 degrees above the horizontal. You grab packages off a conveyor belt and propel them up the ramp. The coefficient of kinetic friction between the packages...

Homework Statement Losing Cargo. A box of mass m rests on the flat floor of a truck. The coefficients of friction between the box and floor are "us" and "uk". The truck stops at a stop sign and then starts to move with an acceleration of a. If the box is a distance x from the rear of the...

Homework Statement A 0.5 kg bead slides on a curved wire, starting from rest at point A as shown in the figure. The segment from A to B is frictionless, and the segment from B to C is rough. The point A is at height 6.9 m and the point C is at height 1.6 m with respect to point B. The...

Ok, I don't get this, when a sphere moves over a frictionless surface tilted downward so getting accelerated, does roll or slide?

Homework Statement A child starts from rest and slides down a frictionless slide. In terms of R and H, at what height h will he lose contact with the section of radius R? (child starts at the top with height H, at the bottom the slide flattens out and then forms a quarter circle to the...

Homework Statement A person wants to push a lamp(mass 9.6 kg) across the floor a) Assuming the person pushes at a height of 60 cm above the ground and the coefficient of friction is 0.20, determine whether the lamp will slide or tip over b) Calculate the maximum height above the floor at which...

Homework Statement A bowling ball is released without spin. How far does it travel before its motion is pure, rolling motion? No data is given, it asks for an order of magnitude estimate. Homework Equations k = mv^2/2 k = Iw^2/2 + mR^2w^2/2 I = 2MR^2/5 torque = Ialpha torque = fk(R)...

A particle of mass m slides down a fixed, frictionless sphere of radius R. starting from rest at the top. Theta is the amount of degrees down the side of the sphere that the particle has slid... a. In terms of m, g, R. and theta, determine each of the following for the particle while it is...

Homework Statement A large sphere was built, with a radius of about 5. Imagine that such a sphere has a radius "R" and a frictionless surface. A small block of mass "M" slides starts from rest at the very top of the sphere and slides along the surface of the sphere. The block leaves the...

Homework Statement A boy sits on top of an igloo shaped like a semi-circle of Radius R. He begins to slide down the semi-circle. At what height above the ground does the boy slide off the semi-circle? Assume g=9.8 m/s2, and no friction. http://img207.imageshack.us/img207/4010/probmd1.jpg...

Hi I am working on an assignment and I honeslty am completely baffled with this question. I have no idea how to go about trying to figure it out as its purely conceptual based. If anyone has any info that might help, I am all ears. The problem is as follows and I am attaching the diagram as...

a 50 kg wagon is being pushed up a 15 degree incline. The coefficient of friction between the wagon and the slope is 0.15. A 15 kg box sits on top of the wagon and the coefficient between the wagon and the box is 0.30. What is the maximum force that you can push the wagon up the slope with...

(I know this type of problem has been discussed on here before, but I still don't understand what to do next) The attached drawing shows a large cube (mass=55kg) being accelerated across a horizontal frictionless surface by a horizontal force P. A small cube (mass=4.5kg) is in contact with...

Can i get some help on this problem? A conducting bar of length L = 25.6 cm and mass M = 35.0 g lies across a pair of conducting rails. The contact friction between the bar and the rails is negligible, but there is a resistor at one end with a value R = 45.0 Ohms. Initially the rod is given an...

http://img244.imageshack.us/img244/1565/mfsto2ie5.jpg Hi all, Would some one please take a look at this problem for me? I am trying to work out this problem, but I have some trouble... The coefficient of kinetic friction between the dresses and the floor is μk. The ground exerts upward...

Think about 2 objects (one rolling one sliding) down an incline. In terms of energy, see what you came up with and how they differ...be verbose! All right I know that the rolling object would go down the incline faster and...i'm not sure but I think...the sliding one would gather the most...

Hello there, this is my first posting on this board. I am a third year physics major and I've taken a lot of courses but I've always just scraped by with a large amount of help from small groups. I'm thinking about reconsidering my major because I feel like I no longer can understand the...

Hi. My question is this. A uniform rod of length 2L is held resting on a horizonal table with length L+a projecting over the edge. If the support is removed, show tthat the rod willb egin to slide over hte ege when it has turned through an angle tan^-1(mu*L^2/(L^2+ 9a^2)). mu is the coeffiecent...