Frictionless Definition and 468 Threads

Homework Statement A block slides down a frictionless half-pipe (shown on the back of this page). It is released from rest at the point (2,0). Determine the velocity, tangential accleration, radial acceleration and angular acceleration when the block goes through angular displacements of 30...

Homework Statement A 2.0 kg block is released from rest on a frictionless 30 degree incline. After sliding 0.80 m it comes in contact with the spring, and after sliding an additional 0.20 m, it comes momentarily to rest. What is the spring constant? I knew that spring constant is equal to...

1. Person is climbing a mountain with rope attached to rock on a flat surface above for support. The slope has an incline angle of 50 degrees. The rock is on frictionless ground, and the mass of the rope can be ignored. The person (100 kg) is 3 meters from the flat surface, the rock (700 kg) is...

[PLAIN]http://www.tumblr.com/photo/1280/12942474909/1/tumblr_lutva4tbpB1qml28n

Homework Statement m=6kg r=0.18m Fapp=33N I'm struggling to understand how to answer this question and correlate the linear force applied to rotation without being given the coefficient of friction causing the rotational motion. The question states that a solid sphere of 6kg is...

[b]1. A 10 kg mass initially at rest is pushed along a level frictionless track by an applied force angled at 45 degrees. The force is exerted for 50m before the mass reaches a ramp and is launched upward to a maximum of 57 meters. how much work did the force do on the mass and what is the...

Homework Statement In the diagram, the pulley is frictionless and the ropes are massless. You are given that m1 = 10.0 kg and m2 = 29.5 kg. Calculate the acceleration of m2 downwards. What is the magnitude of the tension in the string? Homework Equations sum of F= M*A The Attempt at a...

Homework Statement Draw a free body diagram for the block on the frictionless ramp below. Break up any problem vectors into friendly vectors. Will you work in x and y components or parallel and perpendicular? Then, find the magnitude of each force you have labeled. Lastly, find the...

Hi, folks. Studying for an upcoming Physics exam. I've got a few example problems which the professor has solved—and am getting a different answer, but I don't know where the fault is in my reasoning. Could someone tell me whether or not my answer is, too, correct? Homework Statement...

Homework Statement The three blocks shown are relased at t=0 from the position shown in the figure. Assume that there is no friction between the table and M2, and that the two pulleys are massless and frictionless. The masses are: M1 = 2.00 kg M2 = 7.00 kg M3 = 4.00 kg Calculate the speed of...

Homework Statement Hello, folks. I know this same problem has been answered before here but the previous responses are just not doing it for me, sorry! An inclined plane of angle θ = 20.0° has a spring of force constant k = 495 N/m fastened securely at the bottom so that the spring is...

[b]1. a 9.0 killogram mass and a 3.0 kg mass are at rest on a frictionless table. A massless spring is compressed between the masses, which are held together by a thread. The thread breaks and the 9.0 kg mass moves to the left with a velocity of 2.0 m/s. Find the velocity of the 3.0 kg mass...

There's a cord attached to a cart that can slide along a frictionless horizontal rail aligned along an x axis. The left end of the cord is pulled over a pulley, of negligible mass and friction and at cord height h = 1.3 m, so the cart slides from x1 = 5.0 m to x2 = 1.0 m. During the move, the...

Hi, I am confused on the topic of friction. I thought of a question that I cannot answer. What happens if you push an object with a certain amount of force and mass on a frictionless surface? According to F=ma, you will be able to get the acceleration of the object, but how will you know...

Homework Statement The air table is approximately 25 cm square. If the incline has a rise of 1cm over that distance, what is the maximum velocity up the slope that a puck may have and not hit the upper wall Homework Equations ymax = (V^2sin(θ))/(2g) xmax = 2V^2sin(θ)cos(θ)/g The...

Homework Statement Blocks with masses of 2kg , 4kg , and 6kg are lined up in a row on a frictionless table. All three are pushed forward by a 60 force applied to the 2 block. how much force does the 4kg block exert on the 6kg block? how much force does the 4kg block exert on the 2kg...

Homework Statement Consider a frictionless roller coaster such as depicted below. The acceleration of gravity is 9.8 m/s2. Passenger cars start at point A with zero initial speed, accelerate as they go down to point B, swing around the circular vertical loop B ! C ! B of radius 30 m...

Homework Statement Two masses are connected by a light string that goes over a light, frictionless pulley, as shown in the figure. The 8.7-kg mass m1 is released and falls through a vertical distance of h = 1.09 m before hitting the ground. Use conservation of mechanical energy to determine...

Homework Statement A 2.3kg block rests on a frictionless wedge that has an inclination of 30° and an acceleration to the left such that the block remains stationary relative to the wedge; i.e., the block does not slide up or down the wedge. The acceleration of gravity is 9.81 m/s^2. Find...

Homework Statement A pencil is released from rest with θ = pi/2 and topples over. Treat the pencil as a uniform rod and find the velocity of the end A when it strikes the table if the table is frictionless. Homework Equations Classical Mechanics The Attempt at a Solution...

Imagine a frictionless world. Movement along the world is constrained to the plane of the ground. (The world has gravity) How would life on the frictionless world be similar to our own? What are somethings that would not change due to the existence of friction? What are some similarities...

Homework Statement A table is tilted at an angle of θ = 69° with respect to the vertical. Find the magnitude of the new acceleration of block 1. Mass of the block 1 which is on the incline of the plan is 6. Mass of block 2 which is hanging freely from the pulley is 3.9. Homework Equations...

Homework Statement A force given by F(x)=5x^3 (in \frac {N}{m^3}) acts on a 1-kg mass moving on a frictionless surface. The mass moves from x = 2m to x = 6m. a) How much work is done by the force? Homework Equations W=\int F_x from x_o to x_f The Attempt at a Solution \int 5x^3 from...

Homework Statement the blocks shown in the figure are connected by flexible, inextensible cords passing over frictionless pulleys. at A, the coefficient fiction is 0.30 while at B, it is 0.40. compute the magnitude and direction of the friction forces and each block. am i right ? x( please...

The problem states: A horizontal force of 77 N pushes a 12 kg block up a frictionless incline that makes an angle of 60 degrees with the horizontal. What is the normal force that the incline exerts on the block? After drawing the FBD I can see there are only 2 forces acting in the Y...

A uniform ladder leans safely against a vertical wall at an angle 45° to the horizontal ground. The wall is 100% slippery, while at the ground the coefficient of friction is µ . Prove that since the ladder is not falling, µ \geq 0.5 I've attempted to solve this, and think I have...

Homework Statement A train on the planet surface of Mars is traveling along a banked track shaped as large circle with a radius of 500m. Q. Assuming Mars gravity is 3.8m/s^{2} what Velocity v must the Martian train travel to simulate a total artificial gravity equal to Earth's...

Frictionless, horizontal table...radius and speed...? The 0.20 kg puck on a frictionless, horizontal table is connected by a string through a hole in the table to a hanging 1.20 kg block. With what speed must the puck rotate in a cicle of radius 0.50 m if the block is to remain hanging at rest?

Homework Statement A block of mass 12 kg is projected up a frictionless incline with an initial velocity of 8m/s. It just reaches a point B and then slides down again. A) what is the potential energy of the block at B if its potential energy at A is taken as zero? b) what is the...

Homework Statement A ladder of length L is leaning against a frictionless wall. The floor is frictionless too. It starts to fall. At what angle will it leave the wall. Homework Equations The Attempt at a Solution I can derive the equation of motion...

Homework Statement A conducting rod slides down between two frictionless vertical copper tracks at a constant speed of 4.5 m/s perpendicular to a 0.56-T magnetic field. The resistance of the rod and tracks is negligible. The rod maintains electrical contact with the tracks at all times and...

Homework Statement A 5000-kg freight car rolls along rails with negligible friction. The car is brought to rest by a combination of two coiled springs as illustrated in the figure below. Both springs are described by Hooke's law and have spring constants with k1 = 1500 N/m and k2 = 3700 N/m...

Homework Statement The ring (m), which weighs 5Kg, is sliding along a frictionless arc (Shown in the draw). Arc radius - 1.2 meters. There are 2 forces applied on the ring: 1) F - 40N and always tangent to the circle. 2) F' - 150N, 30 degrees above the horizon. Calculate the total...

Homework Statement A toy car of mass 0.300 kg is shot out of a compressed horizontal spring (A), and then travels around a loop-the-loop along a frictionless track. The spring has a spring constant k = 900 N/m, and 3.50 J of energy was stored in the spring by compressing it. (1) How far was...

Homework Statement A ball rolls down a frictionless ramp that has an inclination angle of 25 degrees to the horizontal. The ball then slides across a horizontal frictionless floor that is 20 m to the next ramp. The next ramp has a coefficient of friction of 0.10 and has an inclination angle...

Homework Statement A physics student playing with an air hockey table (a frictionless surface) finds that if she gives the puck a velocity of 5.70 m/s along the length (2.28 m) of the table at one end, by the time it has reached the other end the puck has drifted 5.78 cm to the right but...

Homework Statement The figure below shows a bead sliding without friction along a curved wire in a vertical plane. IMAGE: http://img545.imageshack.us/i/bead.png/ The bead slides starting from rest at position B on the frictionless wire. The direction of the gravitational field is in the...

Homework Statement A picture of the problem and the original question can be seen http://images3a.snapfish.com/232323232%7Ffp733%3B9%3Enu%3D52%3A%3A%3E379%3E256%3EWSNRCG%3D335%3A73%3C377347nu0mrj". Homework Equations The Attempt at a Solution Note that I made my coordinates so...

Homework Statement va=va vb=vb m1>m2 frictionless Homework Equations The Attempt at a Solution So i got this question where m1 is on a table and connected to a pully and m2 is hanging off the table, which have a Va (velocity). Then a few seconds later the pully is drawing in and...

A plank of mass m1 with a bar of mass m2 placed on it lies on a smooth horizontal plane. A horizontal force growing with time t as F — at (a is constant) is applied to the bar. Find how the acceler-ations of the plank w1 and of the bar w2 depend on t, if the coefficient of friction between the...

In the figure shown the pulley are frictionless and the system hangs at equilibrium. If w3, the weight of the object on the right is 200N, what are the values of w1 and w2? http://img228.imageshack.us/i/74717268.png/ http://img228.imageshack.us/img228/2605/74717268.th.png Uploaded with...

Pretend there are two accelerating masses connected to a massless string with a frictionless pulley between them. How can the frictionless pulley (Rotational inertia and radius given) affect acceleration in any sort of way? Also, why is the net force equal to Acceleration * (Mass of two...

mass attached to spring on horizontal frictionless surface. given: position x at time zero, velocity at time zero (not equal to zero), spring constant, and mass. how do I figure out the amplitude?

Homework Statement A bar of mass m, length d, and resistance R slides without friction in a horizontal plane, moving on parallel rails. A battery that maintains a constant emf \epsilon is connected between the rails, and a constant magnetic field B is directed perpendicularly to the plane...

This is not a question from homework, but one about which I was curious. If a ball starts at rest at the top of frictionless plane, would it roll or slide down the incline? The thing that confuses me is that it seems like it should just slide, since there is no friction and thus nothing to...

Homework Statement A water slide can be though of as being frictionless. Let's say a slider starts from rest and goes down a slide that is 30 m long and is set at a 25 degree incline. a) determine the speed of the slider at the bottom of the slide. b) Explain why you don't need to know...

Homework Statement Two beads of mass m are initially at rest at the top of a frictionless hoop of mass M and radius R, which stands vertically on the ground. The beads are given tiny kicks, and they slide down the hoop, one to the rigth and one to the left. What is the largest value of m/M...

1. In Figure 8-49, a block is sent sliding down a frictionless ramp. Its speeds at points A and B are 1.90 m/s and 2.60 m/s, respectively. Next, it is again sent sliding down the ramp, but this time its speed at point A is 3.85 m/s. What then is its speed at point B? Figure 8-49...

Sort of urgent. I've been looking at this problem for days and it's due tomorrow afternoon. Homework Statement Draw a free body diagram for each of the masses. All surfaces are frictionless. The pulley is massless and frictionless. The connecting strings denoted by dotted lines are...

Homework Statement This image: http://i52.tinypic.com/35i0j1k.jpg, assume the table surface and pulley to be frictionless. Please ignore the given a=1.96 in the photo as I will show how I reached that further below. Homework Equations F=ma The Attempt at a Solution Well, my stab at...