Sliding Definition and 733 Threads

1. Homework Statement [/b] This is a pretty simple calculus problem, but I can't figure out why my method fails. A ladder 20 feet long is leaning against the wall of a house. The base of the ladder is pulled away from the wall at a rate of 4 ft/s. Consider the triangle formed by the side of...

Homework Statement A sledge of mass m = 85 kg has initial velocity v0 = 45 m/s and is moving horizontally along a straight line. The net force acting on the sledge is solely due to air resistance and is given by F = −k v2, where the constant is given by k = 1.2 kg/m. Find where the sledge...

Homework Statement A box of mass m with an initial velocity of v0 slides down a plane, inclined at θ with respect to the horizontal. The coefficient of kinetic friction is μ. The box stops after sliding a distance x. How much work is done by friction? Homework Equations...

I have been working with Physics for a while. I have recently come across a problem I could not solve efficiently. I have been designing a sliding door with 4 wheels with a rolling co efficient of 0.03. I thought that if I simply be using Force applied by door on all 4 wheels multiplied by...

Homework Statement A factory worker pushes a 30.0 kg crate a distance of 4.5 m along a level floor ata constant velocity by pushing horizontally on it. The coefficient of friction is .25. I have been trying and i can't figure out how to solve this problem. Every attempt i make is dead...

Homework Statement A cord connected at one end to a block which can slide on an inclined plane has its other end wrapped around a cylinder resting in a depression at the top of the plane as shown in the figure. Determine the speed of the block after it has traveled 1.70 m along the plane...

Homework Statement I'm attaching a picture for the problem. Homework Equations F - N - K(that's my problem) = Ma K = m2a2 N = m1a (the acceleration is the same, since the rolling body pushes the m1 body forward) m1g - K = m1a1 (this is the acceleration in the y direction) a2 = a + a1...

NEED CONCEPTUAL HELP ONLY! A package of eggs (mass 60.0 kg) sits on the flatbed of a pickup truck with an open tailgate. The coefficient of static friction between the package and the truck's flatbed is 0.350, and the coefficient of kinetic friction is 0.250. a) The truck accelerates...

Homework Statement Toby is on a merry-go-round. The coefficient of static friction between his feet and the merry-go-round is 0.5. Toby is located 2 m from the center. a. Once Toby starts to slide he is going to slide outward until he falls off the merry-go-round at radius = 3m. How...

This problem has been bugging me, seeing that my answer seems off. But who knows. Given the following measurements, find the required pushing force needed to keep a book from sliding down the wall. Homework Statement M= 2.88kg Coefficient of static friction= .322Homework Equations Seeing that...

Homework Statement Please refer to the diagram. I have having trouble with B: "Determine the acceleration of the system. Explain your method, and identify and laws you are applying" Ok so for A:, I drew two FBD's. For package A there is Fg, Fnormal, Ffriction, and F from box B - Correct...

dog sliding in a truck. urgent Homework Statement A dog is standing in the tail of a pickup truck. the tail bed is coated with ice causing the force of friction beween the dog and the truck to be zero. The truck is initially at rest, and then accelerates to the right, oving along a flat...

Homework Statement A 2kg box is at the top of an inclined plane that is 10m long. The inclined plane makes an angle of 30° with the ground. The μk of the ramp is 0.36 and the μk of the flat ground at the end of the ramp is 0.50. How far does the box travel along the flat ground until it stops...

Hello, I have two boxes with the same mass sitting on an incline: http://img31.imageshack.us/img31/97/boxesy.png Uploaded with ImageShack.us The coefficient of kinetic friction between A and the incline is greater than the coefficient of kinetic friction between B and the incline...

Homework Statement A 100 g bead is free to slide along an 80 cm long piece of string ABC. The ends of the string are attached to a vertical pole at A and C, which are 40 cm apart. When the pole is rotated about its axis, AB becomes horizontal. Homework Equations F = ma...

"A loaded penguin sled weighing 69 N rests on a plane inclined at angle θ = 22° to the horizontal. Between the sled and the plane, the coefficient of static friction is 0.25, and the coefficient of kinetic friction is 0.20. (a) What is the minimum magnitude of the force , parallel to the...

Homework Statement On 20 degree incline, there are two blocks tied together with a rope, sliding down. the block on the top has mass of 2.0 kg (m1) and u_k1(coefficient of kinetic friction for block 1) = .30 the block on the bottom of the incline has mass of 3.0 kg (m2) and u_k2 = .20 What is...

Homework Statement A uniform ladder of length L and mass M has one end on a smooth horizontal floor and teh other end against a smooth vertical wall. The ladder is initially at rest in a vertical plane perpendicular to the wall and makes an angle \theta0 with the horizontal. (a) Write down the...

Homework Statement See Picture: I am only stuck on Part (c) where it asks to calculate the force as the bookcase starts to tip. Homework Equations sigma Fx=0, sigma Fy=0, sigma tau=0 The Attempt at a Solution I am setting up the problem by picking an axis that runs through the...

Homework Statement A car is sliding down an icy hill inclined at 1.6 degrees, find the coefficient of friction. Homework Equations f_k=\mu_k*n The Attempt at a Solution Don't know how to begin it only given the angle of the hill.

Homework Statement In the following diagram, the brown metallic conductor rod is given a slight push to the left. The black lines are all conducting wires, with the entire setup placed in a perpendicular B-field. Ignore friction. What will happen? 1) The rod slowly come to a stop? 2) The rod...

Homework Statement M1 and M2 are two masses connected as shown. (M1 on hypotenuse of triangle, M2 on right side, (adjacent to right angle)) (Pulley at corner of them, Angle Theta is on the opposite corner) The pulley is light and frictionless. Find the mass M1, given that M2 (4.50 kg) is...

Homework Statement A block is at rest on a plank whose angle can be varied. The angle is gradually increased from 0 deg. At 25.7°, the block starts to slide down the incline, traveling 3.50 m down the incline in 1.50 s. Calculate the coefficient of static friction between the block and the...

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 = 1.0 kg, M2 = 7.0 kg, M3 = 3.0 kg. Calculate the speed of...

Homework Statement A hammer slides off the roof of a house that slopes downward at 40 degrees. The edge of teh roof is 14m avove the ground and the hammer leaves the roof at 7m/s. How far from the edge of the roof does the hammer strike the ground?Homework Equations x direction Vx=V0x...

Homework Statement A block with mass 10kg rests on a smooth, friction less ramp that is inclined at an angle of 45 degrees with the ground. How much force must be applied in the direction parallel to the ground to prevent the block from sliding down the ramp? IT TURNS OUT THAT THE...

Homework Statement A block with mass 10kg rests on a smooth, friction less ramp that is inclined at an angle of 45 degrees with the ground. How much force must be applied in the direction parallel to the ground to prevent the block from sliding down the ramp? IT TURNS OUT THAT THE...

Homework Statement In a laboratory experiment two spherical balls are launched on a °at surface. Both are uniform spheres of radius R and mass m. They are both given the same amount of initial kinetic energy K0. However: -ball A rolls without slipping -ball B slides without rotating...

[PLAIN]http://img221.imageshack.us/img221/541/slope.png Homework Statement two masses sliding down a slope[slope can't move] like in the attached picture. there is a static friction 'c' between the two masses. and between mass a and the slope there isn't any friction. so I am trying to...

Homework Statement A small bead of mass m is free to slide along a long, thin rod without any friction. The rod rotates in a horizontal plane about a vertical axis passing through its end at a constant rate of f revolutions per second. Show that the displacement of the bead as a function of...

In order to get an appreciation for the time scales involved, think about a block that slides without friction down a ramp that is inclined at an angle q above the horizontal. Initially the block is at rest a distance s (measured along the plane) from the bottom. Click the button marked “DATA”...

Given any two random tile arrangements in a sliding tile puzzle, is it always possible to find a way to go from one to the other? It's trivial to prove that this isn't true for 2x2 puzzles, but I don't know how to approach the problem for bigger sizes, short of brute forcing it with a computer...

Hi All, from a totally non physics speaking person, I have been trying my hardest to understand what is involved in working out how many Newtons of force are required to move a simple sliding door. This is not a homework question although it is becoming related to my daily work, so it is for...

Homework Statement I'm stuck on a relatively simple problem. I can't use Lagrangian mechanics, only Newtonian one. A mass m slides without friction over a sphere of radius r and mass M. Find its period and the allowed values of its speed. Homework Equations The sphere isn't in an...

Homework Statement Packages, each one of them with a mass of 1kg, arrives from the moving track to a completely smooth surface of the runway, at a speed of 1 m/s, as described. Calculate the max angle in which every package begins to veer off the runway track, if the radius of the...

Homework Statement [PLAIN]http://img62.imageshack.us/img62/6531/capturefma.jpg Homework Equations Conservation of energy principle T1 + \sum U1-2 = T2 The Attempt at a Solution I have the correct answer for part a). T1 = 0 (since the system starts from rest). T2 =...

Homework Statement http://img263.imageshack.us/img263/1961/carslide.jpg In a car whose mass (m) - 2250 kg, and drives in a velocity of 98 km/h, the driver activates the breaks and causes the four wheels to lock, and the sliding motion of a car through distance d, till decreasing the velocity...

Homework Statement A ball of radius r and mass m starts rolling without slipping up a ramp inclined at an angle φ to the horizontal and reaches a maximum height h. Derive an expression for the angular velocity ω that the ball has at the base of the ramp. [Rolling friction may be ignored in...

Say we have a rectangular object A accelerating with some acceleration a across a rough horizontal surface. Object B starts with velocity v on the top left corner and slides across the top of A subject to a friction force. Now if we consider object A by itself, it is subject to a friction...

1. A boy is seated on the top of a hemispherical mound of ice with radius R. He is given a very small push and starts sliding down the ice. At what height does he leave the ice if the ice is frictionless? 2. Conservation of Mechanical Energy: U1 + K1 = U2 + K2; also gravitational energy...

Homework Statement Snowboarders, standing at the top of a spherical mountain, hold a contest to see who can slide farthest down the mountain before taking flight. Contestants must decide whether to use High Friction Wax A or Low Friction Wax B. "M-dog" Matt Curcio was one of the contestants...

1. A 2.79 kg block is pushed 1.48 m up a vertical wall with constant speed by a constant force of magnitude F applied at an angle of 60.8 with the horizontal. The acceleration of gravity is 9.8 m/s2 .If the coefficient of kinetic friction between the block and wall is 0.581, find the work...

Homework Statement A uniform rod of length l rests on a horizontal floor and leans against a vertical wall, making an angle \theta with the floor. It is initially held at rest. At t = 0, the rod is released and falls, sliding on the floor and the wall with no friction. The only forces acting on...

Homework Statement The two blocks (m = 12 kg and M = 98 kg) in Fig. 6-38 are not attached to each other. The coefficient of static friction between the blocks is μs = 0.37, but the surface beneath the larger block is frictionless. What is the minimum magnitude F of the horizontal force...

Why is it often a faster way around a dirt track to slide around turns? The simplistic view that I got from Physics 101 says that the static friction coefficient is always higher than the sliding friction coefficient. So, that view would imply that a vehicle would be able to go around a turn...

Homework Statement A small block of mass m is sliding along the inclined slope of a wedge of mass M. The block slides without friction on the wedge and the wedge slides without friction on the floor. The slope on the wedge has an inclination \alpha with the floor. Homework Equations...

Question: You and your friend Peter are putting new shingles on a roof pitched at 25 . You're sitting on the very top of the roof when Peter, who is at the edge of the roof directly below you, 5.5 away, asks you for the box of nails. Rather than carry the 2.0 box of nails down to Peter, you...

Need Simple Clarification: Tension and acceleration, one floating block, one sliding Homework Statement gravity is 9.81m/s2 m1 = 2.62kg m2 = 7.62kg [PLAIN]http://uploadpad.com/files/Screen_shot_2011-02-27_at_5.40.01_PM.png Assume the cord to be light (massless and weightless) and...

A chain of length 'l' and mass 'm' lies on the surface of a smooth sphere of radius 'R' > 'l', with one end tied to the top of the sphere. (a) Find the gravitational potential energy of the chain with reference level at the center of the sphere. (b) Find the tangential acceleration dv/dt...

Homework Statement A block is sitting on top of a cart (block A). The cart is being pulled at 200N to the right. If a force F = 200N is applied to the 30 kg, cart, show that the 20kg block A will slide on the cart. Also determione the time for the block A to move on the cart 1.5m. The...