Sliding Definition and 716 Threads

Homework Statement Starting from rest, a 5 kg block slides 2.5 m down a rough 30 degree incline. The coefficient of kinetic friction between the block and the incline is 0.436. The acceleration of gravity is 9.8 m/s2. Find the work done by the force of gravity. Find the work done by...

How do i solve this? here's how far I've gotten suppose i have x[q], y[q]=S, the surface of a hill dy/dx=(dy/dt)/(dx/dt) atan(dy/dx)= the angle of incline at a location on the hill -GM*cos(pi/2-atan(dy/dx))=the tangeantal component of acceleration im ignoring the perpendicular...

Homework Statement Suppose the rod in the figure has mass m= 0.44 kg and length 26 cm and the current through it is I= 40 A. Part A: If the coefficient of static friction is mus= 0.45, determine the minimum magnetic field B (not necessarily vertical) that will just cause the rod to...

If we have an inclined plane at angle \alpha and a sphere on that plane it will have angular acceleration due to the friction force. If F_{lim}<mg\sin \alpha , where F_{lim} is the limiting friction will the sphere also slide along the plane?

Problem #1: The problem is this: A bar is attached to two rods and its acceleration is increasing towards the right. The bar is located in a uniform magnetic field pointing out of the page, towards you. Thus, the current moves clockwise. Find an equation for the current. So far, my...

Difficult: Block sliding up moving ramp Homework Statement A block of mass m with initial velocity of v0 slides up up a ramp of angle \theta and mass M that is not pinned to the ground. It doesn't reach the top before sliding back down. What is the highest point that the block reaches in...

1. Homework Statement [/b] Block 1, with mass m1 and speed 3.6 m/s, slides along an x-axis on a frictionless floor and then undergoes a one-dimensional elastic collision with stationary block 2, with mass m2 = 0.69m1. The two blocks then slide into a region where the coefficient of kinetic...

Energy "lost" in rolling, sliding and torsion Hey everybody, I have a question concerning three states and the state of energy in them. 1. Rolling 2. Sliding 3. Torsion For example: If I have a steel cylinder with diameter d on an axis (no friction in the axis) rolling horizontally over a...

Homework Statement Suppose the rod in the figure below has mass m = 0.375 kg and length 18.5 cm and the current through it is I = 36.2 A. http://img183.imageshack.us/img183/2059/dgian2757.gif If the coefficient of static friction is mus = 0.503, determine the minimum magnetic field B...

Homework Statement If the coefficient os static friction between the incline and block is .3, then what is the minimum force,F, needed to prevent the block from sliding? m=20kg theta= 50 degrees Homework Equations Normal force= mgcosx Fs= uk mgcosx The Attempt at a Solution...

Homework Statement The coefficient of static friction is 0.55 between the two blocks in Figure P8.32. The coefficient of kinetic friction between the lower block and the floor is 0.20. Force FT causes both blocks to cross a distance of 5.0 m, starting from rest. What is the least amount of...

Homework Statement A particle can slide along a track with elevated ends and a flat central part, as shown below. The flat part has length L = 40 cm. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is µk = 0.28. The particle is...

hi everyone, i have slidig gate that i need to install a drive motor. the gate weight is 1500 kg and has 5 v-grove wheels. the dia. of the wheels are 160 mm. We already bought a motor for it but i am concerned about if that motor will be sufficient for this gate. i am trying to calculate the...

Good morning, first post and more than excited that I can get possible help for physics. Only problem I think I have is translating physics problems into soluble questions. Homework Statement A hammer slides 2.5 m down a smooth roof which has an incline of 15 degrees. At the instant the...

Homework Statement A block starts from rest at a height of 3.1 m on a fixed inclined plane. The acceleration of gravity is 9.8 m/s2 . 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? µ =...

Homework Statement A slide-loving pig slides down a certain 35 degree slide in twice the time it would take to slide down a frictionless 35 degree slide. What is the coefficient of kinetic friction between the pig and the slide? Homework Equations fs = Mk * Fn The Attempt at a...

Homework Statement I'm positive Part 1 is right, 2 and 3 I'm sketchy with. 1. A race car with mass 1000 kg moves at speed 40 m/s. What is the kinetic energy of the car in kiloJoules? Do not write the unit in your answer. For this I got 1/2(1000)(40^2) = 800000 convert to kilojoules =...

A 2.20kg textbook is forced against a horizontal spring of negligible mass and force constant 220 N/m, compressing the spring a distance of 0.270 m. When released, the textbook slides on a horizontal tabletop with coefficient of kinetic friction 0.30. Use the work-energy theorem to find how far...

Homework Statement A snowboarder of mass 85 kg slides down the trail shown in the figure below. The first part of the trail is a ramp that makes an angle of 19degrees with the horizontal, and the final portion of the trail is flat. Find the work done by gravity on the snowboarder as she...

Homework Statement I have determined the solution to my problem however now the problem asks me to plot theta as the block flies off the sphere when Mu k ranges from 0.0 to 0.5 in increments of 0.05 I don't know a great deal about working with Microsoft Excel. Well I do just not enough to...

Homework Statement A 4.5 kg block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. The block's initial speed is v0 =...

Homework Statement A block with a mass of 4 kg slides from rest a distance of 2 m down a frictionless inclined plane where it encounters a spring. It compresses the spring a distance 1.4 m before stopping. The inclined plane makes an angle q = 35° with the horizontal. What is the value of...

**Mass sliding down an inclined plane (True/False) Homework Statement A block of mass M is sliding down an inclined plane and is accelerating. Which of the following statements are true? The acceleration of the block is dependent upon the angle of the inclined plane The normal force...

A child and sled with a combined mass of 53.8 kg slide down a frictionless hill that is 8.56 m high. If the sled starts from rest, what is its speed at the bottom of the hill? m/sim not sure how to calculate speed given the information. help please?

How do you find the direction of force on a ramp due to a sliding block I thought it would be in the direction of theta on the triangle but that wasnt correct. Thank you so much for your help!

Homework Statement 1. The problem: Derive an expression in its simplest form to show the relationship between the mass, ramp angle, and acceleration of the sliding object. Explain clearly but briefly the effect of each term in the expression on the actual acceleration, as the ramp angle...

A 4kg wooden block resting on an icy surface (so friction can be ignored) is attached to a horizontal spring (L=1m, k=100N/kg), which is attached on the other end to a vertical wall. A 2g bullet is fired at a speed of 100m/s into the wooden block, pushing it directly toward the wall. What is...

Homework Statement Mr. Wilson is standing near the top of a ladder 24 feet long which is leaning against a vertical wall of his house. Dennis the little boy next door, ties a rope from his tricycle to the bottom of the ladder and starts to pull the foot of the ladder away from the house...

Homework Statement A child with poor table manners is sliding his 240 g dinner plate back and forth in SHM with an amplitude of 0.110 m on a horizontal surface. At a point a distance 7.00×10−2 m away from equilibrium, the speed of the plate is 0.350 m/s 1.What is the period? 2.What...

Homework Statement A metal bar of mass m slides frictionlessly on two parallel conducting rails a distance l apart. A resistor R is connected across the rails and a uniform magnetic field B , pointing into the page , fills the entire region. a) If the bar moves to the right at speed v, what...

Another Lagrangian problem: Bead sliding along a horizontal rotating ring Homework Statement A horizontal ring of mass M and radius a rotates freely about a vertical axis passing through a point on its circumference. If a bead of mass m slides along the ring without friction, what is the...

Physics help? Homework Statement a child with a mass m slides down a 4.0 m high slide. starting from rest, the child has a speed of 3.5 m/s at the bottom of the slide. what percent of the gravitational potential energy of the child at the top of the slide hasn't been transformed into...

Homework Statement Determine the kinetic energy of a bead of mass m which slides along a frictionless wire bent in the shape of a parabola of equation y = x2. The wire rotates at a constant angular velocity \omega about the y-axis. Homework Equations T = \frac{1}{2}m(\dot{x}^2 +...

I want to build a porter governor to control the speed of a shaft via a varible dia double cone pulley. The speed range to be considered is b/w 250-750 rpm. I would like to know the equations involved. My textbook provides theoretical equations, I would be obliged if I could get the actual...

Homework Statement A brick is sliding down a ramp Anet / acceleration = .5 m/s^2 m= 2 kg M = the coefficient of friction = unknown or ? The Attempt at a Solution I'm just stuck on the last part well first this is my work so far: 90-delta= 90 - 35 = 55 Fg= (2)(-9.8) Fg= -19.6 Fg x = Fg...

Homework Statement Let there be two spheres, of equal radius but unknown masses (mass isn't important). Both move down a ramp of angle \theta, where \theta can be any angle but 90 deg. or 0 deg. The first sphere slides down the ramp with no (negligible) friction. This sphere does...

Homework Statement "Suppose the sloping surface was very slippery so no rolling occurs (the can slides). Would the can reach the bottom sooner or later compared with the rolling motion? Explain the difference" I don't know if its relevant, but the slope was 4cm at the high end, and 1.5...

Homework Statement A block of mass, m, sits atop a semicircular bowl of radius, r, and the angle the radius makes with the horizontal is \theta. Find what angle, \theta, the block will slide off the bowl.Homework Equations \frac{1}{2}mv^2 + mgy = \frac{1}{2}mv^2 + mgy \alpha=ar...

Homework Statement A block of mass 19.0 kg is sliding down an inclined plane. Due to friction between the block and the plane the block is moving at constant speed. If the coefficient of kinetic friction is 0.24), what is the angle of the plane with respect to the horizontal ? m = 19kg...

Hi people, here's my problem: A uniform, flexible rope of length D, mass M, hangs off a frictionless table-top of height greater than D. The length of the section of rope hanging off is A. Gravity accelerates the part of the rope that is hanging off, so the length of the hanging part increases...

Homework Statement A 15 kg mass is sliding at 30 m/s when it encounters a slope (smooth=no friction) and descends 60 m. It encounters a horizontal rough stretch (friction = 80N in opp. direction). Calculate the velocity at x=0 (rough stretch starts here), x=50, x=100, x=200. Calculate...

"Sliding DFT" discrete Fourier transform... I was wondering if any of you had had experience with the sliding DFT algorithm. It is somewhat similar to the Goertzel algorithm. I am having some trouble understanding the mathematics of the algorithm, and I also cannot seem to identify a useful...

the block is sliding down a wooden plane that has an incline of 22.67 degrees. the block has a mass of 31.0g. also, the block has an acceleration of 16.94m/s^2 Homework Equations f = ma fnormal = (mass x acceleration due to gravity) (cos22.67) (i think?) i tried to find the force...

If this question is completely stupid, forgive me, I'm a few years out of university and math and physics are quickly leaving my brain... :) Say a particle has a non zero velocity in one direction and a non zero acceleration in the opposite direction. If you also account for some sliding...

hi there! I considered the following problem: a ball of radius R on a horizontal plain is at first in rest. Then it receives a horizontal force for a very short time at a point placed 1/3R from the plain and the ball starts moving with initial velocity v_0. There is also a friction when...

A 38.5g block is sliding at 5.0m/s on the upper surface which is frictionless and 1.00m above the lower frictionless surface. The block slides down a ramp that is at an angle of 18.5 degrees. What must the friction force on the ramp be in order for the block to have a velocity of 5.5m/s at the...

For our Manufacturing class, one of our take-home quizzes is to find out why, as surface roughness continues to decrease (think of very finely polished materials) the static friction between the plates as you try and slide them will increase. Basically, really rough surfaces will be hard to...

Homework Statement It seems simple, doesn't it? A bead starts from (0,1/2) and simply slides down the parabola y=(1/2)(x-1)[SUP]2 under gravity. The problem is to get its position rel. to origin in terms of time, ie. r = [x(t),y(t)]. Anyone into this? Homework Equations y' = x-1 = tan...

(Green means correct) Homework Statement In the figure below, a small block is sent through point A with a speed of 8.1 m/s. Its path is without friction until it reaches the section of length L = 12 m, where the coefficient of kinetic friction is 0.70. The indicated heights are h1 = 8.0 m...

Okay, i can't figure this out, can anyone help me? here is the problem: A 75 kg box slides down a 25.0 degree ramp with an acceleration of 3.60 m/s squared. a. find mew k between the box and the ramp. b. what acceleration would a 175 kg box have on this ramp? so i got this basic...