In the following figure we have a system composed of two blocks, with masses mA = 3.525 kg and maF 1.41 kg, which are joined by an ideal rope that passes through an ideal pulley. The horizontal surface:on which block A is located has a kinetic friction coefficient µk. The system is released from rest and block B is observed to descend with constant speed. The coefficient of kinetic friction µk is:

In the following figure we have a system composed of two blocks, with masses mA = 3.525 kg and maF 1.41 kg, which are joined by an ideal rope that passes through an ideal pulley. The horizontal surface:on which block A is located has a kinetic friction coefficient µk. The system is released from rest and block B is observed to descend with constant speed. The coefficient of kinetic friction µk is:

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A 3.00-kg block is placed at the top of a track consisting of two frictionless quarter circles of radius ?=3.00 m connected by a 5.00-m-long, straight, horizontal surface as shown in the figure. The coefficient of kinetic friction between the block and the horizontal surface is ?k=0.100. The block is released from rest. What maximum vertical height ? does the block reach on the right‑hand section of the track? y = ? (in m)
A block of mass m = 1.85 kg is pushed a distance d = 3.15 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle ? = 32.0° below the horizontal as shown in the figure below. A block labeled m is on a horizontal surface. An arrow labeled vector F points downward and to the right at an angle ? above the horizontal, and acts upon the upper left corner of the block. A faded image of the block is a distance d to the right of the block. (a) Determine the work done on the block by the applied force.(b) Determine the work done on the block by the normal force exerted by the table.(c) Determine the work done on the block by the force of gravity.(d) Determine the work done by the net force on the block.
Consider the incline shown in the figure with inclination angle θ and height h. The coefficient of kinetic friction between a block of mass m and the incline changes along its surface. From A to B it has a value of μ1, and from B to C its value is μ2. The block (not shown) is given an initial velocity up the incline at point A with a magnitude vA. A) What is the value of vA for which the block will reach the top of the incline (point C) with zero kinetic energy? Your answer should be written in terms of the quantities given in the statement. B) Show that for the block to surpass point B, the initial speed at A should satisfy the inequality vA > √[ (2/3)gh(1+μ1cotθ) ]
A crate of mass m is initially at rest at the highest point of an inclined plane, which has a height of 4.7 m and has an angle of θ = 28° with respect to the horizontal. After it has been released, it is observed to be traveling at v = 0.85 m/s a distance d after the end of the inclined plane as shown. The coefficient of kinetic friction between the crate and the plane is μp = 0.1, and the coefficient of friction on the horizontal surface is μr = 0.2. Find the distance d, in meters.
A 4.40–kg block is set into motion up an inclined plane with an initial speed of vi = 7.60 m/s (see figure below). The block comes to rest after traveling d = 3.00 m along the plane, which is inclined at an angle of θ = 30.0° to the horizontal. (d) What is the coefficient of kinetic friction?
A 1500-N crate is to be held in place on a ramp that rises at 30.0° above the horizontal (see figure). The massless rope attached to the crate makes a 22.0° angle above the surface of the ramp. The coefficients of friction between the crate and the surface of the ramp are uk = 0.450 and us = 0.650. The pulley has no appreciable mass or friction. What is the MAXIMUM weight w that can be used to hold this crate stationary on the ramp? %3D W= ? Crate 22.0° Ramp 30.00
A 19.0 kg box is placed at the top of an inclined plane and released to either move freely or sit at rest. The plane is at an angle of 30° above the ground and has a total length of d = 2.80 m along the incline. The coefficient of static friction between the box and the plane is us = 0.40 and the coefficient of kinetic friction is pk = 0.30. What kind of friction does the box experience once it is released, and what is its magnitude? m d Kinetic, Fkf - 55.9 N Static, Fsf = 74.5 N Static, Fsf = 64.5 N Kinetic, Fkf = 48.4 N
A 52.5-kg sled is pulled across a horizontal icy surface as in the figure. The horizontal pulling force of magnitude P is directed opposite to a constant 35.0-N kinetic friction force. Starting from rest, the sled acquires a final speed of 2.25 m/s after being pulled a distance of 20.0 m. Two forces act on a sled that is on a horizontal surface. An arrow labeled vector fk extends from the left side of the sled and points left. An arrow labeled vector P extends from the right side of the sled and points right. The lengths of the arrows are approximately equal to each other. What is the magnitude P of the pulling force? N?
An object is on earth with a mass of 10.0 kg at the top of a frictionless inclined plane of length 8.00 m and an angle of inclination 30.0° with the horizontal, and with an initial velocity down the plane of 2.0 m/s. The object slides from this position and it stops at a distance d from the bottom of the inclined plane along a rough horizontal surface with friction, as shown. The coefficient of kinetic friction for the horizontal surface is 0.400. (a) What is the speed of the object at the bottom of the inclined plane? (b) At what horizontal distance d from the bottom of the inclined plane will this object stop? Use Newton’s Laws for constant acceleration and Friction Forces to solve. Do not use Conservation of Energy concepts: zero credit if you use Conservation of Energy.
A man pushing a crate of mass m = 92.0 kg at a speed of v = 0.875 m/s encounters a rough horizontal surface of length ℓ = 0.65 m as in the figure below. If the coefficient of kinetic friction between the crate and rough surface is 0.354 and he exerts a constant horizontal force of 292 N on the crate. A man pushes a crate labeled m, which moves with a velocity vector v to the right, on a horizontal surface. The horizontal surface is textured from the right edge of the crate to a horizontal distance ℓ from the right edge of the crate. (a) Find the magnitude and direction of the net force on the crate while it is on the rough surface. magnitude N direction (b) Find the net work done on the crate while it is on the rough surface. J(c) Find the speed of the crate when it reaches the end of the rough surface. m/s
A block of mass m1 = 20.0 kg is connected to a block of mass m2 = 30.0 kg by a massless string that passes over a light, frictionless pulley. The 30.0-kg block is connected to a spring that has negligible mass and a force constant of k = 250 N/m.The spring is unstretched when the system is as shown in the figure, and the incline has a coefficient of friction of 0.2. The 20.0-kg block is pulled a distance d = 20.0 cm down the incline of angle of 30.0 degrees and released from rest. Find the speed of each block when the spring is again unstretched.
Wnet = m(v₁)² = m(v₁)², Wnet = Σ₁ W₁, W = Fd cos 0 Problem 1: A 2.0 kg box slides on a floor. A friction force of 5.0 N opposes the motion. If the box starts with a speed of 5.5 m/sec, how far does is slide before coming to rest? Answer: d = 6.1 m Problem 2: What is the force a 60.0 kg sprinter exerts backward on the track to accelerate from 2.00 m/sec to 8.00 m/sec in a distance of 25.0 m, if they encounter a wind that exerts an average force of 30.0 N against them? Hint: Wnet = Wrunner - Wwind. Answer: Frunner: = 102.0 N Problem 3: A 500-kg dragster accelerates from rest to a final speed of 110 m/sec in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is the work done by the dragster? Hint: Wnet = Wdragster - Wfriction. Answer: Wdragster = 3.5 × 106 J