Ramp Definition and 672 Threads

Homework Statement A student is skateboarding down a ramp that is 5.9 m long and inclined at 12° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 2.3 m/s. Neglect friction and find the speed at the bottom of the ramp. Homework Equations...

I figured out where I was going wrong, it was in the trig for getting the force down the ramp. mgsinθ, not mg/sinθ, although I still got the right answer for the last part using mg/sinθ. Homework Statement A spring is set to move along the surface of a frictionless ramp, which is tilted...

Homework Statement Hello, this is my first post here. I am trying to find acceleration for an object sliding down a ramp. I have the length + height of ramp. Height: 6.5cm Length: 130 cm Homework Equations I'm at loss here. Vectors are included and this is a kinematics question...

Homework Statement There is a ramp, with an angle of 30 degrees. The height of the ramp is 10 m. There is a mass at the bottom of the ramp. Assuming the ramp is frictionless, determine the initial speed that the mass must have so that it just comes to rest at the top of the ramp. Part 2 is...

Homework Statement Find the frictional force (magnitude and direction) on the crate if the crate is sliding up the ramp. Frictional force= ? μk = 0.30 μs = 0.74 mass=10.0 kg angle of incline 30° to the horizontal Homework Equations fk=uk * N The Attempt at a Solution I...

Homework Statement A wedge of mass m= 1kg that is initially at rest is driven up a friction less ramp by a horizontal force F=50Ndue to a small attached rocket. The ramp is equilateral, with sides of length 50m What is the magnitude of the normal force exerted by the ramp on the wedge...

Homework Statement A coin slides down a ramp angled at 30∘ with respect to the horizontal. If the coin starts from rest, what is its speed in m/s after sliding 1 m? Homework Equations The acceleration of an object on a ramp is a=mg*sin(x), where g=9.8 m/s^2 and x is the angle...

Homework Statement A 19.0 kg box sits on a frictionless ramp with a 14.9° slope. The movers pull up a rope attached to the box to move it up. If the rope makes an incline with the ramp that is 42.0° to the horizontal, what is the smallest force F the mover must use to move the box up the...

Homework Statement A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 30∘ angle. The block's initial speed is 10m/s. The coefficient of kinetic friction of wood on wood is μk=.200. What vertical height does the block reach above its starting point? The answer is...

Homework Statement A girl enters a ramp with a speed of 30ft/s. The ramp has 4ft in height and 15ft in length. Calculate the speed at which she comes out of the ramp. Homework Equations - The Attempt at a Solution I was thinking of just using cosθ=x/z, and just plugging in the...

Homework Statement Plot this signal y(t)=3u(t+3)-r(t+2)+2r(t)-2u(t-2)-r(t-3)-2u(t-4) The Attempt at a Solution I tried to draw each single function, but do not know the way to plot for the whole signal like the bottom graph

Mario's new additions to the company's standard ramp include two hard nylon rails which run the length of the ramp; the crates which have to be moved will slide along the hard nylon rails with almost no friction. In the space on the ramp which is in between the nylon rails, Mario has installed a...

Physics Help Greatly Appreciated -- Block sliding down ramp A 7.7 kg block is on an incline with a coefficient of static friction of 0.50. The angle that the ramp makes with the horizontal is increased gradually, until the block begins to slide down the ramp. If you know that the coefficient of...

Homework Statement I kick a puck of mass m up an incline (angle of slope = θ) with intial speed v0. There is no friction between the puck and the incline, but there is air resistance with magnitude f(v) = cv2. Write down and solve Newton's second law for the puck's velocity as a function of...

Homework Statement A ramp is shown in the picture.Which ramp is easier to rise an object of mass 2kg up?and why? Homework Equations W=FS The Attempt at a Solution The second ramp.The work done in rising the mass against gravity is same in the two ramps.That is W=200N*1 = 200J...

Homework Statement As of the past few hours I've been trying to make sense one how to calculate the velocity of a sphere that moves down a frictionless ramp. My biggest problem with this seems to be that I'm confusing myself with the linear velocity and the angular velocity. Note that the...

Homework Statement You do 2.2 kJ of work pushing a trunk at a constant speed 3.1 m along a ramp inclined upward at 22 degrees. What is the frictional coefficient between the trunk and the ramp? Homework Equations W = F*d Ff = μmg * cos(θ) Fg = mg * sin(θ)The Attempt at a Solution To find the...

Here are the few equations i set up... which ultimately led to a wrong answer. (In my solution, subscripts A refers to the ramp, B refers to the rolling pipe) ---------- I have a feeling that the acceleration if pipe A isn't simply downwards at 30deg. Cos the ramp is rolling away, so...

Homework Statement A ball of radius ro rolls on the inside of a track of radius Ro. If the ball starts from rest at the vertical edge of the track, what will be its speed when it reaches the lowest point of the track, rolling without slipping? Included below is a link to the diagram...

This is from an old course I took. I'm not sure what I'm doing incorrectly. Homework Statement Two identical bowling balls are rolling on a horizontal floor without slipping. The initial speed of both balls is V = 9.9 m/s. Ball a encounters a frictionless ramp, reaching a maximum height...

Homework Statement A ball of mass 2.60 kg and radius 0.120 m is released from rest on a plane inclined at an angle θ = 36.0° with respect to the horizontal. How fast is the ball moving (in m/s) after it has rolled a distance d=1.90 m? Assume that the ball rolls without slipping, and that its...

Homework Statement http://puu.sh/2fjvF If a ball rolls off a ramp like in the diagram, what happens in terms of vertical and horizontal components? Neglecting all friction etc, I understand the horizontal component would not change, but what happens when it comes off the ramp? Does the...

Hi all, I am getting confused about how to calculate steady state error in a system. My particular transfer function is: G(s)= 4.992/(s^2+3s-1) Firstly, with an input step am I right in saying that the Steady State error will always be zero? If so can someone explain the reason behind this...

Can someone please help in finding a suitable rotary actuator? I need it to lower the rear wheelchair ramp of a car. So the motor would attach directly to a shaft. When it causes the shaft to rotate it would lower the ramp which is welded onto the shaft. I'm finding it hard to find a rotary...

Homework Statement You observe that after sliding down a distance of 2.61 m along a 5 m long track that is inclined at 20 degrees to the horizontal, a block of wood has a velocity of 0.13 m/s. If the coefficient of kinetic friction between the wood and the surface of the track is 0.40, what...

Homework Statement Suppose there is a block attached to a spring with spring constant k. The block is pushed so that it compresses the spring a distance x_1. The block is released and slides without friction up a ramp, coming to a maximum height h_1 above the ground. Suppose we compressed the...

Homework Statement A 5.0 kg block is placed near the top of a frictionless ramp, which makes an angle of 30.0o degrees to the horizontal. A distance d = 1.3 m away from the block is an unstretched spring with k = 3000.0 N/m. The block slides down the ramp and compresses the spring. Find the...

Homework Statement A block starts at rest and slides down a frictionless track except for a small rough area on a horizontal section of the track It leaves the track horizontally, flies through the air, and subsequently strikes the ground. The acceleration of gravity is 9.8 m/s2 . What is...

Hi guys! This is due tomorrow and I'm finally breaking down to ask for help in figuring it out. Homework Statement "A small block is placed at height h on a frictionless ramp, which is inclined by an angle θ from the horizontal. Upon release, the block slides down the ramp then falls a...

Ramp With Friction - Help Appreciated! Homework Statement When mass M is at the position shown, it is sliding down the inclined part of a slide at a speed of 2.41 m/s. The mass stops a distance S2 = 1.9 m along the level part of the slide. The distance S1 = 1.22 m and the angle θ = 37.10°...

I typed this up on MP's Whiteboard, but the tutors were taking way too long to respond: (question is also attached) Edit: Units are in meters. Questions asks to Find h (small h defining the height of the ramp). The exact moment the object leaves the ramp, it would have components Y=gsin(30) and...

1. I produced a unit set function in MATLAB however my professor requires me to use a ramp function to be multiplied to a signal to filter out unnecessary parts of an earthquake chirp, this is being used in my project to determine whether the chirp was caused by a nuclear bomb. 2. ideally...

Homework Statement A box with a mass of 22 kg is at rest on a ramp inclined at 45 degrees to the horizontal. The coefficients of friction between the box and the ramp are μs = 0.78 and μk = 0.65 a) Determine magnitude of the largest force that can be applied upward, parallel to the ramp...

Homework Statement Four objects are placed at rest at the top of an inclined plane and allowed to roll without slipping to the bottom in the absence of rolling resistance and air resistance. • Object A is a solid brass ball of diameter d. • Object B is a solid brass ball of diameter 2d. •...

Homework Statement If Inga, the Laboratory Assistant, rolls a spare head down a 4 m ramp because it was spherical and solid and too heavy at 4.5 kg at a speed of 4.5 m/s, what was its total kinetic energy? Homework Equations KE = (1/2) I ω^2 I = (2/5) MR^2 The Attempt at a Solution...

Homework Statement A car is elastically launched up a ramp and we are required to calculate the normal force of the car at certain heights up the ramp. Homework Equations The Attempt at a Solution I am able to calculate the elastic potential energy of the car during launching and...

Homework Statement Suppose you lift a 23kg box by a height of 1.0m. How much work do you do in lifting the box? 230 J Instead of lifting the box straight up, suppose you push it up a 1.0 -high ramp that makes a 30 degree angle with the horizontal. Being clever, you choose a ramp with no...

Homework Statement Assume the ramp and block make the following coefficients of friction: (μs=0.9 μk=0.3) and the 2 kg mass is placed at rest on the ramp and a horizontal force F is also applied. http://img69.imageshack.us/img69/4097/filepq.jpg What is the biggest magnitude force F...

Homework Statement On flat surface there is small cart m and big, initally resting ramp with mass m and height h. a) At what speed should the cart travel to roll on the flat area on top of the ramp and stop relativly to it? b) Assuming that cart moves with speed greater than calculated in a)...

Homework Statement What happens if you enter a banked rough ramp with a speed lower or higher than the speed limitHomework Equations The Attempt at a Solution If you enter the ramp with a speed greater than the speed limit the car will spin out of the curve due to the forces contributing to...

Homework Statement Basically there's a ramp; its inclined plane has length "a", the base has length "b" and its height has length "c". The ramp is stationary, but it has wheels under it. The ramp weighs 120N. The center of mass of the ramp is located at 2/3 of "b" on the horizontal axis...

Homework Statement A solid sphere of mass m and radius r rolls without slipping along the track shown below. It starts from rest with the lowest point of the sphere at height h above the bottom of the loop of radius R, much larger than r. (Consider up and to the right to be the positive...

Homework Statement Two blocks of mass m1 and m2 on a ramp with a frictionless surface? PLEASE HELP!? A diagram shows two blocks of mass m1 and m2 on a ramp with a frictionless surface. The blocks are connected by a massless string over a massless frictionless pulley. The ramp makes an angle...

A student is skateboarding down a ramp that is inclined 20 degrees with respect to the horizontal. The speed of the skateboarder at the top of the ramp is 3.0 m/s and the speed of the skateboarder at the bottom of the ramp is 7.6 m/s. The frictional force between the ramp and the skateboard is...

Homework Statement Movers must push a piano onto a truck, the bed of which is a height 1.73 m above the ground. To do this they will use a frictionless ramp. If the piano has a mass of 1635.0 kg and the movers push it up the slope at a constant velocity, how much work do they need to do on...

Homework Statement Two blocks are joined together with a rope that runs over the pulley. The mass of m2 is 5kg and the incline is 35 degrees (m2 hangs off the edge of the ramp, pulling on m1). The coefficient of static friction between mass 1 and the inclined board is 0.2. Determine the largest...

Hi, I'm in the process of building a marble run out of brass wire using 15mm steel ball bearings. For ease of visualisation, it will be similar in principle to this: http://www.youtube.com/watch?v=0FRYX-kcZ9k&feature=relmfu I want to include a "jump" where the marble travels up a ramp at...

Homework Statement A box of mass   4.0 kg is placed at rest on a ramp. The coefficients of static and kinetic friction are $&  0.35 and $%  0.22, respectively. As the ramp is slowly raised from a horizontal orientation, find the critical angle above which the box starts to slide...

Need Help -- dragging a trunk up a loading ramp Homework Statement A man is dragging a 68 kg trunk up the loading ramp of a movers truck, the ramp has a slope of 20deg and the man pulls upward with a force F whose direction makes an angle of 30deg with the ramp. The coefficient of kinetic...

Homework Statement Hello all, kinda angry at myself for posting this but my brain has hit a brick wall. This is an easy problem too... anyway. A frictioness ramp of mass M and incline θ sits on a frictionless surface. A block of mass m sits on the ramp. What horizontal force F must be applied...