The Duquesne Incline () is a funicular located near Pittsburgh's South Side neighborhood and scaling Mt. Washington in Pennsylvania, United States. Designed by Samuel Diescher, the incline was completed in 1877 and is 800 feet (244 m) long, 400 feet (122 m) in height, and is inclined at a 30-degree angle. It has an unusual for United States (but standard for Finland, Mongolia and the former-USSR) track gauge of 5 ft (1,524 mm).
"a block of mass m is sliding on a frictionless incline of 30 degrees. this incline has mass m and it has no friction with the ground. compute the acceleration for both objects."
I'm having some conceptual trouble with this problem as it's been a while since my physics course and I've had...
1.
A block is projected up an incline making an angle theta with the horizontal. It returns to
its initial position with half its initial speed. Show that the coefficient of kinetic friction is
μk = (3/5)tan(theta)
(For a 'properly formatted' version of the question, see number 3 on the...
Homework Statement
In the figure, a crate of mass m = 107 kg is pushed at a constant speed up a frictionless ramp (θ = 32°) by a horizontal force http://edugen.wiley.com/edugen/shared/assignment/test/session.quest1510980entrance1_N10037.mml?size=14&rnd=1298229739658 .[/URL] The positive...
Homework Statement
Homework Equations
Trigonometry
Geometry - Intersection on a Line
Physics - Newtons Laws
The Attempt at a Solution
I am just lost. I move the Cartesian coordinates to the incline of the free body diagram to begin.I know that the normal force is perpendicular...
I want to calculate the maximum angle an object can move. So my example is a vehicle using two motors going up an incline. Do I use Torque = r * F * sin(angle) until the torque totals to a constant max torque value but with a speed of 0? I did think maybe I had to change values to equal the...
Packages are thrown down an incline at A with a velocity of 1 m/s.
The packages slide along the surface ABS to a conveyor belt which moves with a velocity of 2 m/s.
Knowing that d = 7.5 m and µ = 0.25 between the packages and all surfaces, determine...
a) speed of the package at C
b) distance...
Homework Statement
A 5 kg block is placed near the top of a frictionless ramp, which makes an angle of 30o degrees to the horizontal. A distance d = 1.3 m away from the block is an unstretched spring with k = 3000 N/m. The block slides down the ramp and compresses the spring. Find the maximum...
I read in my book that when we are calculating the amount of work done by a man to go up a flight of stairs we use as force his weight and the distance, the vertical displacement.
Then, looking at this website http://www.physicsclassroom.com/mmedia/energy/au.cfm they illustrate a car going...
question says: a block is given an initial velocity of 2m/s up a frictionless plane inclined at 60 degree to the horizontal. what is the highest point reached by the block?
I tried to figure out how to solve the problem by thinking in order to find the highest point, i need the distance it...
Homework Statement
A dated box of dates, of mass 5.00 kg, is sent sliding up a frictionless ramp at an angle of θ to the horizontal. The figure below gives, as a function of time t, the component vx of the box's velocity along an x-axis that extends directly up the ramp. (The vertical axis...
Homework Statement
A 2-kilogram block is released from rest at the top of a curved incline in the shape of a quarter circle of radius R. The block then slides onto a horizontal plane where it finally comes to rest 8 meters from the beginning of the plane. The curved incline is frictionless...
Homework Statement
M1 and M2 are two masses connected as shown. The pulley is light (massless) and frictionless.
Find the mass M1, given that M2 (3.5 kg) accelerates downwards at 2.77 m/s2, θ is 25o, and μk is 0.37.
Homework Equations
F = ma
F = mg
Ff = μkNThe Attempt at a Solution...
Homework Statement
Some members here may have seen this problem before. The problem is:
A projectile is fired up an incline (incline angle φ) with an initial speed, v ,at an angle θ with respect to the horizontal (θ>φ). What is the angle that will allow the projectile to travel the maximum...
A 17.0 kg box slides 4.0 m down the frictionless ramp shown in the figure, then collides with a spring whose spring constant is 190 N/m.
Picture: http://session.masteringphysics.com/problemAsset/1000077659/2/knight_Figure_10_69.jpg
We also know:
a) What is the maximum compression of...
Homework Statement
A block of mass m=2.2 kg slides down a 30 degree incline which is 3.6 m high. At the bottom, it strikes a block of mass M=7 kg which is at rest on a horizontal surface. If the collision is elastic, and friction can be ignored, determine (a) the speeds of the two blocks after...
When pushing an object up an incline, isn't work done in the horizontal direction?
But when lifting it direction, no work is done in the horizontal direction.
So why does my textbook say that the work done in both cases is the same? :(
Homework Statement
A block of mass "m" slides at constant speed down a uniform plane inclined at an angle "degrees symbol" to the horizontal, as shown.
- Shows an incline with a block on top, like this: "<" with a block on top.
1. On the diagram, sketch and label appropriate arrows to...
Homework Statement
An Air Cart of mass m=10kg starts from rest on an inclined air track. It subsequently moves a distance of d=20m in a time t=4 sec along the track. There are two support legs that are a distance L= 20m apart. One of the legs is elevated to a height h=15m above the other...
An 8kg mass is initally at rest on a 30 degree frictionless incline, it is attached to a hoop shaped 5kg pulley of radius 25.0cm by a massless cord. Find the tension in the cord and the acceleration of the mass using Newton's Laws.
Homework Statement
Determine the angle of incline on https://www.physicsforums.com/attachment.php?attachmentid=30517&stc=1&d=1291856979" frictionless air track.
Acceleration = 0.147 m/s2.
The answer is supposed to be 4.10°.
Homework Equations
Fnet = ma
The Attempt at a...
This should be a pretty simple question for someone out there,
If you have a ramp with the same height, and the same angle, and you take two spheres of different size, but identical materials, and you rolled them down this incline. Which would reach the bottom first if rolling friction is...
Homework Statement
Incline with the mass of M and angle of theta. mass on the incline with the mass of m. Find the force needed to push the entire system such that the mass remains at rest relative to the incline. Everything is frictionlessHomework Equations
F=maThe Attempt at a Solution
well...
Homework Statement
I'll just sum the question up:
A vehicle is on an incline of 15° and has velocity initial of 100km/h or 27.77
m/s and is left in neutral to roll up the hill -which is inclined at 15°. How far will it roll up the hill?
Homework Equations
I tried going with Vf - Vi = d...
Homework Statement
A 2.5 kg wooden block slides from rest down an inclined plane that makes an angle of 30o with the horizontal. If the plane has a coefficient of kinetic friction of 0.20, what is the speed of the block after slipping a distance of 2.0 m?
Homework Equations
The...
Homework Statement
In a circus performance, a monkey is strapped to a sled and both are given an initial speed of 4 m/s up a 20 degree inclined track. The combined mass of monkey and sled is 20 kg and the coefficient of friction between the sled and incline is .20. How far up the incline do the...
Homework Statement
A wooden block of mass 3.2 kg is sitting near the bottom of a plance inclined at an angle of 23 deg relative to the horizontal. The block is given an initial velocity of 5.0 m/s up the plane. The coefficient of kinetic friction between the block and the surface of the...
Homework Statement
An inclined plane with 20.0 degree angle has a spring with k=500 N/m at the bottom of the incline. A block of mass m=2.5kg is placed on the plane at a distance d=.300m from the spring. From this position, the block is projected downward toward the spring with speed v=0.750...
1. An 8.3 kg crate is pulled 4.8 m up a 30 degree incline by a rope angled 18 degrees above the incline. The tension in the rope is 120 N and the crate's coefficient of kinetic friction on the incline is 0.24. How much work is done by tension, by gravity, and by the normal force? What is the...
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...
A cylinder of a mass M and a radius R starts at the top of a hill at a height h, and rolls to the bottom. At the bottom of the hill, what is its linear velocity, linear momentum, and angular momentum?
I believe the the velocity is sqrt((4/3)gh) and the the angular momentum is mvsin(theta)...
Homework Statement
A 219-kg crate rests on a surface that is inclined above the horizontal at an angle of 20.1°. A horizontal force (magnitude = 501 N and parallel to the ground, not the incline) is required to start the crate moving down the incline. What is the coefficient of static...
Homework Statement
A 38.7g box slides down an incline of height 12.5m. As it slides, air resistance does -3.71J of work. Find the speed at which it reaches the bottom of the incline.
Homework Equations
E kinetic at bottom = E potential at top - Work air resistance
1/2 mv2 - 1/2...
Homework Statement
this is simple but I am stuck
in a lab, a 6kg block is pushed across a flat table by a horizontal force F. if the box is moving at a constant speed of 0.350m/s and the coefficient of kinetic friction is .12 what is the magnitude of F
Homework Equations
The...
Homework Statement
A 11kg box slides 4.0m down the frictionless ramp which has an incline of 30o to the horizontal, then collides with a spring whose spring constant is 190 N/m.
a.What is the maximum compression of the spring?
b.At what compression of the spring does the box have its...
Homework Statement
http://s324.photobucket.com/albums/k327/ProtoGirlEXE/?action=view¤t=q1-1.jpg
Homework Equations
f=ma
f= uFn
The Attempt at a Solution
a) I found the forces acting on the block acting in the x and y directions to make two equations
then I solved for...
Homework Statement
A block of mass 2 kg is propelled by a spring with spring constant k=5200N/m onto a smooth (frictionless) track. The spring is initially compressed a distance of 0.13 m from its equilibrium configuration. At the end of the track there is a rough inclined plane at an angle...
Hey, I've taken Intro Physics years ago with an A but am reviewing some stuff and doing some of the harder problems out of Young and Freedman, I can't figure this one out to my embarrassment. Any help?
Heres the link of what I've done.
http://i.imgur.com/yD5G1.png"
1. A 2000 kg car in neutral at the top of a 20 degree inclined 20 meter long driveway slips its parking break and rolls downward. at what speed will it hit the garage door at the bottom of the incline? Neglect all retarding forces
Homework Equations
The Attempt at a Solution
Homework Statement
A solid mass weighing 50 kg slides down an incline plane with the coefficient of kinetic friction being 0.05. The velocity is measured to be 2.00 m/s and 5.00 m/s at two points 15 m apart. What are the A) Magnitude and direction of all forces action on the solid mass B)...
A block slides down an inclined plane, here are the variables:
theta of incline = 37 degrees
mass of block = 10 kg
coefficient of kinetic friction = .500
applied force on block...
Homework Statement
A box of mass 96 kg is pushed up an inclined plane which makes an angle of 21 degrees with the horizontal. The box moves at a steady speed of 3.2 m/s.
(a) What force, parallel to the plane, is being applied? (4 marks)
(b) What horizontal force is require to produce...
Homework Statement
A block of mass m is placed in a smooth-bored spring gun at the bottom of the incline so that it compresses the spring by an amount xc . The spring has spring constant k. The incline makes an angle theta with the horizontal and the coefficient of kinetic friction between the...
Homework Statement
Two blocks, as shown below, are connected by a string of negligible mass passing over a pulley of radius 0.225 m and moment of inertia I. The block on the frictionless incline is moving up with a constant acceleration of 1.97 m/s2 on an angle of 35.1 degrees.
m1 = 15.4...
1. Homework Statement [/b]
Box A1 (2.0 kg) and Box A2 (5.0 kg) are slide down a ramp. They are connected by a rope (mass less) and the coefficient of kinetic friction between A1 and ramp is 0.200 and A2 is 0.100.
1) Calculate tension in the rope
2) Magnitude of the acceleration of A1/
Homework Statement
A 63-kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between the skis and the snow is 0.20. What would be the magnitude of the acceleration?
Homework Equations
f=ma
fg=mg
fnet=mAnet
Ff=μῦFn
The Attempt at a...
Homework Statement
A machine in an ice factory is capable of exerting 3.3 * 10^2 N of force to pull large blocks of ice up a slope. The blocks each weight 1.21 *10^4 N. Assuming there is no friction, what is the maximum angle that the slope can make with the horizontal if the machine is to be...
Incline question with a moving cart and a pebble is launched...?
Homework Statement
A cart is rolling down an incline with angle thetha and the cart's speed is Vo when a pebble in the cart is launched. When the ball returns to the same initial distance above incline, will it fall into the...
Homework Statement
Given: A block of mass 0.30 kg rests on the inclined surface of a wedge of mass 1.0 kg. The wedge is acted on by a horizontal force and slides on a frictionless surface.
Question: If the coefficient of static friction between the wedge and the block is µs = 0.40, and...
Homework Statement
A spring with a spring-constant 2.5 N/cm is compressed 35 cm and released. The 4 kg mass skids down the frictional incline of height 37 cm and inclined at a 20◦ angle. The acceleration of gravity is 9.8 m/s2 . The path is frictionless except for a distance of 0.5 m along the...
Homework Statement
A car with a mass of 560 kg is parked on a hill inclined at 4.5 degrees to the horizontal.
a.) What is the force of fricton necessary to hold the car on the slope?
b.) If there is ice on the hill and the car is about to slip, what is the coefficient of static...