Ramp Definition and 672 Threads

I am making a high intensity LED light panel for my aquarium. I got 15 1w Luxeon white LEDs rated at 350mA max continuous current and 3.42V forward voltage. The LED driver I am planning to use is Xitanium LED-120A-0024V-10F. Here is a link to the datasheet...

Homework Statement A small block of mass m rests on the rough, sloping side of a triangular block of mass M which itself rests on a horizontal frictionless table as shown in the figure. http://s7.photobucket.com/albums/y252/mikey555/?action=view&current=GIANCOLIch05p033.jpg (edit: image...

Homework Statement a hollow sphere is rolling long a horizontal floor at 5 m/s when it comes to a 30 degree incline. how far up the incline does it roll before reversing direction?Homework Equations The Attempt at a Solution it seems like conservation of energy would work best for this problem...

How do you find the direction of force on a ramp due to a sliding block I thought it would be in the direction of theta on the triangle but that wasnt correct. Thank you so much for your help!

Homework Statement A brick is sliding down a ramp Anet / acceleration = .5 m/s^2 m= 2 kg M = the coefficient of friction = unknown or ? The Attempt at a Solution I'm just stuck on the last part well first this is my work so far: 90-delta= 90 - 35 = 55 Fg= (2)(-9.8) Fg= -19.6 Fg x = Fg...

Homework Statement Let there be two spheres, of equal radius but unknown masses (mass isn't important). Both move down a ramp of angle \theta, where \theta can be any angle but 90 deg. or 0 deg. The first sphere slides down the ramp with no (negligible) friction. This sphere does...

Homework Statement A hollow, 50N ball and a 50N hoop are released from rest at the top of a 3m long ramp. Both objects have a diameter of .5m. If the ball reaches the bottom in 5s, and the hoop in 7s, find (for each object): a. velocity at the bottom b. angular speed at bottom c. moment of...

Homework Statement A hollow cylinder (hoop) is rolling on a horizontal surface at speed v= 3.3 m/s when it reaches a 15 degree incline. (a) How far up the incline will it go? (b) How long will it be on the incline before it arrives back at the bottom? Homework Equations Energy...

Homework Statement Ugh, rusty on my Newtonian Mechanics and need to refresh. I picked out this problem in my book: Two boxes are on a 30 60 90 triangle. Box 1 is on the 60degree side and Box 2 on the 30degree side. The ramp has two different coefficient of static friction: u1 (for box 1)...

Homework Statement A .20 kg hockey puck is launched up a metal ramp that is inclined at a 30.0 degree angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are Ms= .40 kg and Mk=.30 kg , respectively. The puck's initial speed is 35.0 m/s. What is...

Two packages at UPS start sliding down the 20 degree ramp.Package A has a mass of 5.0kg and a coefficient of friction of 0.20. Package B has a mass of 10 kg and a coefficient of 0.15. how long does it take package A to reach the bottom...

I need to find the frictional forces and a snowboarder going off of a cuved jump. I know the coefficient of friction for the snow and the snowboarder is .05. The veolcity as the snowboarder is coming into the curved jump is: sqrt(2(9.8*100*sin(theta))-(.05*9.8*100*cos(theta))) I know...

My physics teacher gave us this challenge question as homework, and basically the entire class is struggling with it. Guidance would be much appreciated. A ball is released, with an initial velocity of 0, on a 1 m long ramp. The ramp is set up on a table, approximately .75 m above the ground...

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 (as shown in: http://img392.imageshack.us/img392/5711/25li4.jpg ). It leaves the track horizontally, flies through the air, and subsequently...

Homework Statement A 2.1 kg is released from rest from the bottom of a 45 degree inclined ramp. The package is attached to an ideal spring K = 35 N/m that is attached to the top of the incline causing the package to be launched up the incline. The coefficients of friction between the package...

Homework Statement http://img360.imageshack.us/img360/8953/ramppd7.png A block of mass m slides at velocity vo across a horizontal frictionless surface toward a large curved movable ramp of mass 3m as shown in Figure 1. The ramp, initially at rest, also can move without friction and has a...

Homework Statement In this problem, I am supposed to find something wrong with a formula dealing with the problem. There is a block with mass m on a ramp of height h inside a box truck moving with constant velocity u. The angle of the ramp doesn't matter, as this problem will be using energy...

http://img412.imageshack.us/img412/7050/blockspringrampfrictionfy0.gif A man pulls a block of mass m = 20 kg up an incline at a slow constant velocity for a distance of d = 3.5 m. The incline makes an angle q = 33° with the horizontal. The coefficient of kinetic friction between the block...

Homework Statement A 1.79-kg block slides down a frictionless ramp, The top of the ramp is h1 = 1.54 m above the ground; the bottom of the ramp is h2 = 0.287 m above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance away. Calculate the distance...

Could someone help with this problem I don't know how to set it up with the worker pushing parallel to the floor instead of the plane. A UPS worker is loading a truck by pushing boxes weighing 120 kg up a ramp that makes an angle of 32 degrees above the floor. The coefficients of friction...

Homework Statement A 1.79-kg block slides down a frictionless ramp, as shown in the figure below. The top of the ramp is h1 = 1.54 m above the ground; the bottom of the ramp is h2 = 0.287 m above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance...

A man pulls a block of mass m = 19 kg up an incline at a slow constant velocity for a distance of d = 6 m. The incline makes an angle q = 32° with the horizontal. The coefficient of kinetic friction between the block and the inclined plane is µk = 0.2. a) What is the work Wm done by the man...

Can someone help with this problem I don't even know where to start I have my freebody diagram drew up but I don't know where to go from there A UPS worker is loading a truck by pushing boxes up a ramp that makes an angle of 32 degrees above the floor. The coefficients of friction between a...

Homework Statement A 160kg box is on a plane with an incline of 35 degrees. A rope is attached to the box and a pulley at the top of the ramp and has a tension of 1240 N. The static coefficient of friction is 0.45. Will the box move up the ramp? If so, what is its acceleration? Homework...

Block, Ramp, Friction, and Spring Due Tomorrow! Homework Statement A man pulls a block of mass m = 17 kg up an incline at a slow constant velocity for a distance of d = 3.5 m. The incline makes an angle q = 33° with the horizontal. The coefficient of kinetic friction between the block and...

Homework Statement A 3.50 kg block slides 3.40 m down a long 15 degrees inclines ramp. the coefficient of friction between the block and the ramp is 0.30. find the following: (a) the work done on the block by friction (b) the work done on the block by gravity (c) the work done on the block by...

Homework Statement An 85.0-N crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined at 27.0° to the ground. (a) What is the normal force exerted on the crate by the ramp?(b) The interaction partner of this normal force has what magnitude...

Homework Statement A block is shot up a frictionless 40degree slope with intial speed v. It reaches height h before sliding back down. The same block is shot with the same speed up a frictionless 20 degree slope. On this new slope, the block reaches height? Homework Equations 1/2...

I designed this lab for my physics class where we roll a hot wheels car down a length of wood that measured 1 m long. we did this process three times at varying angles and we want to investigate how changing the angle affects the coefficient of friction. The problem is, the times that we...

Homework Statement A professor has to haul a cart down a ramp. The ramp has an angle of about 10 degrees and is about 5 meters long. His initial speed at the top of the ramp is 6 m/s, and the cart has a mass of about 95 kg. How hard does he have to pull on the cart so that at the bottom of the...

Homework Statement Each box weighs 40 lbs, the angles are measured relative to the horizontal. The surfaces are smooth (no friction). Determine the tension in rope A and the normal force exerted by box B by the incline. Homework Equations W = mg ΣF_x = 0 ΣF_y = 0 The Attempt...

1. What is the acceleration of a skateboard down a ramp inclined at 19.5 degrees to the horizontal? 3.271 is the answer. 2. I know g Sin\vartheta is the equation to get it, but I don't get why it isn't g divided by Sin\vartheta 3. In my head I thought the picture was like...

If I have a ball/sphere is released from rest, rolls (without slipping) down a ramp, then drops from the table the ramp is on, how many revolutions does the ball make during the fall? The diameter of the ball, height of the ramp, and height of the table are known. And I calculated the...

I understand the equation to find the coefficient of friction. fr = a/b a -> height of the ramp b -> length of the base of the ramp. But i understand that it's also possible to find friction coefficient using angle of elevation of the ramp. So if i know the angle of elevation and...

A 3kg block is released from rest at the top of a frictionless ramp 1.5m long. The acceleration of the blick is measured to be 3.8m/s/s. What is the angle x of the ramp? all answers in degrees a)x= 12.1 b)x=16.3 c)x=22.8 d)x=25.2 e)x=37.4

Hi, I'm new to this forum. I'm currently doing a project on the coefficients of different materials used in sports so as to study the effects they have in their respective sports. Because we lack the equipment and knowledge to calculate drag, i'd like to ask whether a material having high...

[SOLVED] Magnitude of force of box on ramp. Hello PF, this is my first post on PH. I am hoping that someone will be able to walk me through the question below. I’d really appreciate your help. Thanks. :smile: So, the question is as follow: A box with a mass of 22 kg is at rest on a ramp...

A circular hoop of mass m, radius r, and infinitesimal thickness rolls without slipping down a ramp inclined at an angle theta with the horizontal. View Figure PART A. What is the acceleration of the center of the hoop? Express the acceleration in terms of physical constants and all...

Homework Statement A stunt driver wants to make his car jump over 8 cars parked side my side below a horizontal ramp. (a) With what maximum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5m above the cars and the horizontal distance he must clear is 20m. (b)...

Two builders carry a sheet of drywall up a ramp. They exert vertical forces at the lower corners of the sheet. Assume that W = 2.00m, L = 3.10m, theta = 15.0 degrees, and that the lead builder carries a weight of 123.0N (27.7lb). What is the weight carried by the builder at the rear ? \tau =...

need urgent helllllp! im in year 12 at the moment and our new physics teacher has set us an assignment. it is very deceptively simple he informs us. it reads: does a marble at the top of a ramp convert all of its potential energy up the top, into kinetic energy at the bottom of the ramp...or...

Homework Statement "A bowling ball rolls without slipping up a ramp that sloped upward at an angle B to the horizontal. Treat the ball as a uniform, sold spehere, ignoring the finger holes. a) explain why the friction force must be directed uphill. b) what is the acceleration of the center of...

Homework Statement A block with mass m = 24.6 kg slides down an inclined plane of slope angle 38.4 o with a constant velocity. It is then projected up the same plane with an initial speed 4.90 m/s. How far up the incline will the block move before coming to rest? Homework Equations...

Homework Statement A 1200 kg rocket car is placed at the bottom of a 100 metre long ramp inclined at 10 degrees. The rocket is turned on and it exerts a force of 8300 N for 5.7 seconds, and then it shuts down. Find the speed with which the rocket car leaves the ramp (assume frictionless)...

[SOLVED] Distance a rocket travels on a launch ramp Homework Statement A 1600kg rocket is to be launched with an initial upward speed of 51.0m/s . In order to assist its engines, the engineers will start it from rest on a ramp that rises 53 degrees above the horizontal. At the bottom...

[SOLVED] Height of a Ski Ramp Homework Statement You are designing a ski jump ramp for the next Winter Olympics. You need to calculate the vertical height h from the starting gate to the bottom of the ramp. The skiers push off hard with their ski poles at the start, just above the starting...

1) A small ball rolls down the frictionless ramp on the left (shown below). The angle of the ramp is approximately 23 degrees, as shown, so the acceleration of an object rolling down the ramp is g sin(23 deg) = 4 m/s^2. The ball is given a push when it starts 1 meter away from the bottom of...

We rolled down a cart down a ramp with a tickertape. When the average velocities were calulated and they were used to calculate acceleration. But we got acceleration of like 0.6, 0.2m/s^2 etc... shouldn't it be 9.8m/s^2..?! When i graphed the average velocity and the line of best fit was...

Homework Statement Given the following variables find how far the ball will land away from the point it leaves the ramp to the point it hits the ground. Vertical: Delta X= 1m Velocity Final= ? Velocity Initial= ? Acceleration= -10 m/s^2 t= ? Horizontal: Delta X= ? <- Objective...

three blocks on a frictionless 45° ramp held together by massless ropes top block's mass, m1=1.00 kg. middle block's mass, m2=2.00 kg bottom block's mass, m3=3.00 kg. 1. the force 'FE' is exerted on block one and is just enough to hold all the blocks in place find FE and the tensions of the...