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).
Homework Statement
a)which way does this system go?
b)write force equations
c)find acceleration of the 10kg mass
THE ROPE IS SUPPOSED TO BE ATTACHED TO THE MASS NOT THE RAMP IN THE PICTURE
Homework Equations
m1 is the 10kg mass..m2 is the 8kg mass
u = coefficient of frictionThe Attempt at a...
Homework Statement
See the figure. This is part of a larger problem involving electromagnetism. I understand the electromagnetism but am having trouble with the basic mechanics!
I have a block of mass M on a frictionless incline at angle phi. There is a magnetic force acting horizontally on...
an object weighing 3.0 kg has an initial velocity of 3.33m/s up a 37 degree incline. how far will it go before it stops?
you don't have to do the work, I just don't know what equations to use to solve it.
Homework Statement
A uniform pole of mass is at rest on an incline of angle , secured by a horizontal rope as shown in the figure.
http://session.masteringphysics.com/problemAsset/1034182/4/RW-12-57.jpg
For what angle does the situation require the greatest coefficient of friction?Homework...
I've been doing some problems relative to car on an incline (and also boxes on an incline).
Let's suppose we are given a problem with kinetic or static coefficient.
I'm confusing when should or should not apply kinetic friction to a car, for example in some problems if brakes are applied then...
Hi. I have problem with my homework. I have already searched related theoretic basis and I have already tried to solve it too, but I need some feedback, if my solution is right. I would like to ask you for it. Thank you very much.
Homework Statement
http://katus.kabel1.cz/homework.jpg
The...
Okay, so I am writing a lab but I am quite stuck on one question.
Using the average force of sliding friction from the data, calculate the coefficient of sliding friction.
Average force of sliding friction: 0.32N
The equation I used to calculate other static/sliding coefficients was...
I have kind of a stupid question to ask, but its just something I really don't understand. So in pictures (like the one below) where an object is sitting on an inclined plane, why is it that the angle between the force of gravity and the incline plane is the same as the angle of the incline...
Homework Statement
To push a 33 kg crate up a frictionless incline, angled at 15° to the horizontal, a worker exerts a force of 100.4 N, parallel to the incline. As the crate slides 1.50 m, (a)how much work is done on the crate by the worker's applied force? (b) How much work is done on the...
Homework Statement
Car is driving up a slope, 16o to the horizontal, trying to accelerate as much as possible. Static friction coefficient = 0.9. Kinetic Friction coefficient = 0.8. Find the magnitude of the maximum possible acceleration (assuming a powerful enough engine).
Homework Equations...
Homework Statement
A block of mass m1 is attached to the axle of a uniform solid cylinder of mass m2 and radius R by massless strings. The two accelerate down a slope that makes an angle \theta with the horizontal. The cylinder rolls without slipping and the block slides with coefficient of...
Homework Statement
What power is needed to drive a car at 60 km/h up a 10% grade.
mass=1800kg
v=60km/h
theta=5.7106
g= 9.81 m/s^2
Homework Equations
P = Fv
P_ave= W/T
w=mg
F=maThe Attempt at a Solution
I drew my diagram and FBD.
Since Fy=mAy=0..
0=N-sin(5.7106)
N=1755.2477
I know that...
Homework Statement
In the figure below, a block of mass m = 11 kg is released from rest on a frictionless incline angled of angle θ = 30°. Below the block is a spring that can be compressed 2.0 cm by a force of 270 N. The block momentarily stops when it compresses the spring by 5.4 cm...
A uniform disk of mass m and radius R rolls without slipping down a ramp inclined at angle q to the horizontal.
Using the angle f through which it turns as a generalised coordinate, write the lagrangian, and then the Hamiltonian.
Write out and solve Hamilton’s equations of motion.
Ok, so...
Homework Statement
Two blocks, A and B (with mass 20.0 kg and 40.0 kg , respectively), are connected by a string, as shown in Figure P5.64. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is μk = 0.290. Determine the change...
Homework Statement
perpendicular weight is given,
Parallel weight is given
Need to find actual weight and angle of incline
Homework Equations
The Attempt at a Solution
we are conducting a lab where measurement of force on an incline is necessary. the mass which is pulled is a small concrete block (15.8 kg) on a wooden ramp. as the ramp is increased the force changes (increasing) which is expected. last we need to look at the coefficient of friction at...
Homework Statement
A spring is mounted at an angle of 29 degrees on a frictionless incline as illustrated in the figure below. The spring is compressed to 15 cm where it is allowed to propel a mass of 4.6 kg up the incline...
Homework Statement
A mass of 2000kg is on a 30 degree incline
the mass is in static equilibrium
a force F is applied to the mass (uphill) from the front of the mass
the front wheel is 1m away from the centre of mass
the rear wheel is 2m away from the centre of mass
the center of mass is...
Homework Statement
A 3812.0 kg truck is parked on a 18.1° slope. What is the friction force on the truck?
Homework Equations
The Attempt at a Solution
So i set up a triangle with and then used:
weight of truck= (9.8 m/s^2 *3812 Kg) = 37367.6 N
sin(18.1) = (37367.6 N) /(-Ff)
Ff =...
1. a block is pushed up a 35 degree incline (no friction) by an applied force. If F= 20N and m= 2.0kg, what is the magnitude of the resulting acceleration of the block?
2. not sure?
f=ma
3. don't know where to start. It has been a long time since physics
This has been driving me crazy because I thought I knew what I was doing, but the book says I'm wrong. I even worked backwards the answer in the book and it makes no sense to me. Please work this out and tell me what I'm doing wrong.
Homework Statement
A block of mass m1 = 250g is at rest on...
Homework Statement
A 2kg mass starts from rest and slides down an inclined plane 8.0X10m long in 0.50s. What net force is acting on the mass along the incline?
Homework Equations
The Attempt at a Solution
I don't even know where to begin.
Homework Statement
A horizontal force of magnitude F = 197 N is used to push a box of mass m = 5 kg from rest a distance d = 13 m up a frictionless incline with a slope q = 34°.
Homework Equations
How much work is done on the box by the gravitational force during this same displacement...
Homework Statement
Find the tension in each cord (three cords) in the figure if the weight of the suspended object is 250 N. There are two systems
System 1
Cord A is 30 Degrees below horizontal on the left, Cord B is 45 degrees below Horizontal on the right. Cord C connects the other two...
Homework Statement
block 1 lying on an inclined plane is connected to block 2 by a cord passing over a pulley.
the coefficient of kinetic friction between block 1 and the plane is .21 and block 1 and 2 are 2.6 kg. As block 2 moves down, determine the magnitude of the acceleration of block 1...
Homework Statement
A 725 gm block slides down an inclined plane that makes an angle of 30° with the horizontal. It accelerates at 1.5 m/s2.
a) Find the magnitude and direction of the total force exerted on the block by the plane. For the direction, give the angle as measured...
Homework Statement
Two masses M1 = 2.5kg and M2 = 4.0kg are on inclines and are connected together by a string . The coefficient of kinetic friction between each mass and its incline is Uk = 0.30.
If moves up, and moves down, determine their acceleration.
Homework Equations...
Hello. I am new to this forum. I am a chemist. Physics is not my strength. Recently, I got a speeding ticket and I have to do some simple calculations in order to silence my mind. The problem is the following:
A car (m = 1498.95 kg) is constantly accelerating uphill (15 degrees incline) from...
Spring Energy--a block slides down a frictionless incline plane
A block of mass m = 13 kg is released from rest on a frictionless incline angled of angle θ = 30°. Below the block is a spring that can be compressed 2.0 cm by a force of 270 N. The block momentarily stops when it compresses the...
Homework Statement
A dis of mass (m) and radius (r) with I=(1/2)(m)(r^2) is rolling down an incline dragging with it a mass (m) attached with a light rod to a bearing at the center of the disc. The friction coefficients are the same for both masses, Uk and Us.
Determine the linear...
"If two balls, of different weight where put on the same incline, would they roll down together? Explain using Newtons laws."
I tried it, and as I thought, the heavy one went faster, but why?
A=F/m
...but force is said to be "mass x gravity (9.8N) x sin (the angle)"
but divided by...
Homework Statement
A ball rolls up a straight incline. The dots in the diagram represent the position of the ball every 4 seconds.
(The fourth dot is not intended to represent the turnaround point; the ball might still be on the way up at that
point.) The instantaneous velocities at the...
Homework Statement
A ball rolls up a straight incline. The dots in the diagram represent the position of the ball every 4 seconds.
(The fourth dot is not intended to represent the turnaround point; the ball might still be on the way up at that
point.) The instantaneous velocities at the...
Homework Statement
3.0-kg block slides on a frictionless 37° incline plane. A vertical force of 15 N is applied to the block. The acceleration of the block is?
Homework Equations
m*g*sin()
The Attempt at a Solution
3*9.8*sin(37) - 15 = 2.7
A block of mass M is being pulled up an inclined plane at a constant speed, by an attached rope that exerts a tension T. The block is pulled a distance L. The plane makes an angle θ with the horizontal, and the coefficient of kinetic friction between the block and the incline is μk.
a.)...
Homework Statement
A board is inclined at an angle of 17.5 degrees. The coefficient of friction between a 15.0 kilogram block and the board is .085. what will be the speed of the block if it slides down the board a distance of 4.0 meters, starting from rest?
Homework Statement
A ball of mass M and radius R starts from rest at a height of 50 cm and rolls down a slope. What is the linear speed of the ball when it leaves the incline?
Homework Equations
The Attempt at a Solution
I just need a relevant starting hint. I should be able to do...
Homework Statement
Find the acceleration of block A when moving downward
Theta=40 degrees
A=103N
B=31N
Static coefficient = 0.56
Kinetic coefficient = 0.25
Homework Equations
F=ma
Normal Force * Kinetic coefficient = Friction Force
The Attempt at a Solution
From 103/9.8 I get a mass of...
The problem states that a 3900kg trailer is pulled by a tractor up a 16 degree incline with a steady speed of 3.0m\s.
I am asked what force the tractor exerts on the trailer.
I said that the force was equal to the (W)(sin)16degrees, i get the right answer in the back of the book but i...
A shopper pushes a 7.5kg shopping cart up a 13 degree incline.
I need to find the force required to give the cart an acceleration of 1.41m\s\s up the incline.
ive tried breaking the weight, force and acceleration into components but i just end up getting more confused...any help on...
The problem is modeling a solid ball or radius R rolling down an incline of angle Theta. Note that I am an Electrical Engineer who is somewhat flaky with rotational concepts (but not completely useless :p). If the ball was rolling down a road (or any solid, flat surface), I get the following...
Homework Statement
A cylinder with radius R, length l, and density ro has a 10 turn coil of wire wrapped lengthwise. The cylinder is placed on the ramp tilted at an angle theta, with edge of the coil parallel to the ramp's slope. A uniform mag. field points straight up.
For what loop...
Homework Statement
An inclined plane that makes an angle of 28° to the horizontal is mounted on wheels. A small block of mass m = 2 kg rests on the plane, held there by a coefficient of static friction µ = 0.66.
The plane is accelerating to the right, as shown. What is the minimum...
Homework Statement
A ball has a diameter of 25.4 cm and a mass of 566 g. It can be approximated as a hollow spherical shell. Starting at rest, how long will it take to roll 10 m down an an incline of 30 degrees if it doesn't slip?
Homework Equations
Energy conservation
I = 2/3 mr^2...
Homework Statement
a book restson the shelf of a bookcase. the reaction force to the force of gravity acting on the book is?
A.)the weight of the book
B.)none of these
C.)the force of the shelf holding the book up
D.)the frictional force between the book and shelf
E.)the force exerted by...
Homework Statement
Three blocks of masses 10kg, 5kg, and 3.090 kg are connected by light strings that pass over frictionless pulleys as shown. The acceleration of the 5kg block is 2m/s^2 to the left, and the surfaces are rough. Find the tensions in each string and the coefficient of friction...
Homework Statement
Lets set up the Coordinate system. Y up is Positive, X right is Positive.
g is directed Downward
The Incline with 45 Degree corners Accelerates in the Positive X Direction with an Acceleration A. What is the Acceleration of the Block.
Answer Clue: When A = 3g...
Objects of Masss m1= 4kg and m2 = 9kg are connected by a light string that passes over a frictionless pulley. Object m1 = is held at rest on the floor, and m2 rests on a fixed incline of 40 degrees. The objects are released from rest, and m2 slides 1 meter down the <b>rough</b> incline in 4...
Homework Statement [/b]
Objects of Masss m1= 4kg and m2 = 9kg are connected by a light string that passes over a frictionless pulley. Object m1 = is held at rest on the floor, and m2 rests on a fixed incline of 40 degrees. The objects are released from rest, and m2 slides 1 meter down the...