Rollercoaster Definition and 63 Threads

My son is in year 7. Please see attached image for more details and context. We don't understand why the answer to the question no 4 is "F" and not "D"? The rollercoaster travelling at the fastest speed..... He put D but the correct answer is F. Please help. Thank you in advance.

Why I think gravity *is* the only force doing work on the rider: 1) The only forces acting on the rider are gravity and the normal force. Broken down into their component vectors, we have: -> The component of the force of gravity moving parallel to the rider's direction of motion -> The normal...

I my attempt, I set the drop height to 20m and using conservation of energy, i calculated the speed at the bottom. Calculating centripetal acceleration, if the radius of the circle is less than 10m then the g force is greater than 5, if equal to 10m the velocity at the top is 0 and there is 0...

For my final semester exam, where building paper roller-coaster with marbles as the coaster and one of the things were testing is ride duration. The group with the longest run time will get extra credit and my GPA could really use the boost. so i guess my question is what's the best way to...

Homework Statement A roller coaster car is going over the top of a 14-m-radius circular rise. At the top of the hill, the passengers "feel light," with an apparent weight only 60 % of their true weight. How fast is the rollar coaster going? My problem first is I am unsure where the normal...

Hello Physics Formums, because of constructive feedback I have decided to create a K'NEX Rollercoaster that uses a Fushigi Gravity Ball instead of the standard K'NEX cars. I thought of the design while I was doing chemistry homework, and after I finished my homework I got to work. Two days later...

Homework Statement <I will attach a diagram below> In terms of m, g and r. FInd the normal force at the top of the loop. Homework Equations ∑F = Fc = FN+Fg ∴ Fc=FN+Fg ∴FN = Fc - Fg ∴ N=mV2/r - mg The Attempt at a Solution Fc=mV2/r - mg and V2=ra and a=g ∴C=mrg/r ∴C = mg ∴mg-mg=N ∴ N=0 N. BUT...

Hi(This thread might have been posted in the wrong section of the forum although this isn't a homework problem, just something I do because I like physics!), I've been trying to figure out how to solve this problem for a few hours, but whatever I do it seems to give me the wrong answer. h(1)=...

If a car falling from H rides downhill to h and then uphill back to H on a frictionless road and the hills all reach the same altitude H , in theory it can cover any distance, without an engine, right? Of course there shouldn't be sharp curves, something like this...

Hi, I've done a prac at school where we had to take an accelerometer onto a ride and obtain a graph in at duration. However, the data I've obtained (Acceleration in X, Y Z and resultant) is experimental data. I need to calculate theoretical data for certain segments of the ride. Assuming that I...

Homework Statement In an amusement park ride called The Roundup, passengers stand inside a 19.0m -diameter rotating ring. After the ring has acquired sufficient speed, it tilts into a vertical plane, as shown in the figure 1. Suppose the ring rotates once every 5.50s . If a rider's mass is...

I understand that in a rollercoaster loop, two forces combine to make the centripetal force required to keep the cart moving in a circular path - the cart's weight, and the reaction force of the track against the cart (except in the special case where the cart's weight alone is sufficient for...

Homework Statement A roller-coaster car initially at a position on the track a height h above the ground begins a downward run on a long, steeply sloping track and then goes into a circular loop-the-loop of radius R whose bottom is a distance, d, above the ground in the figure. Ignore friction...

Homework Statement A small car of mass m is released at height h on a steel track. The car rolls down the track and through a loop of radius R. At the end of the track, the car rolls off the track, which is positioned at a height H above the floor. Neglect friction and the small amount of...

Say I had a special type of compass which was free to rotate about its axis in the vertical plane. If I were to ride a roller coaster which had a 360 loop, would the dip angle of the compass needle change as I rode through the loop?

Homework Statement So there's an assignment that I must complete which is to build a rollercoaster. The main problem is during the blueprint stage, I'm extremely confused with the calculations. This roller coaster must have one loop, a collision and 2 hills, the goal is the conserve the most...

Homework Statement You take a bathroom scale onto a stand-up rollercoaster (the riders are always in a standing position). Before the ride starts, you stand on the scale and note that it reads 65 kg. The ride starts and at the top of the first loop you are upsidedown and your scale reads...

Why is the normal force on the top of roller coster greater then mg?

How would you go about calculating the velocity of a rollercoaster once it reaches the bottom, specifically, something like this: http://www.joyrides.com/sfmm/photos/superman1.jpg It's not hard to calculate the velocity it accumulates during the vertical part but how do you deal with the...

Homework Statement A frictionless rollercoaster does a vertical loop with a radius of 6.0m. a) what is the minimum speed that the roller coaster must have at the top of the loop so that it stays in touch with the rail? Homework Equations 2∏r should be used for the circumference but i...

Homework Statement A roller-coaster car has a mass of 1150 kg when fully loaded with passengers. As the car passes over the top of a circular hill of radius 16 m, its speed is not changing. (a) At the top of the hill, what is the normal force (using the negative sign for the downward...

Homework Statement The rollercoaster moves freely without negligible friction. The radius of the loop is 20m and the car barely makes it through the loop. Find the speed at position 3. Find the speed at position 1 and 2. Find the difference in height between position 1 and 4 if the speed...

Homework Statement The roller-coaster car shown in Fig. 6-41 (h1 = 50 m, h2 = 13 m, h3 = 25 m), is dragged up to point 1 where it is released from rest. Assuming no friction, calculate the speed at points 2, 3, and 4. Homework Equations v2= Square Root of 2*Gravity*Height The...

Hi, I'm new to this forum. Just a quick intro, my name Is Allen and I attend Collage and I currently study Year 10 Physics. We are just learning the basics of movement and such. I have created a model roller coaster, the cart is a ball bearing weighing 0.0010 kg, it has to roll around a...

Homework Statement At the top of the loop, we are in an upside down position, with our head being pointed towards the centre of the circle. As long as the ride is fast enough, it's impossible for us to fall out. But what happens if the ride slows down? if the rollercoaster slows down, the...

Homework Statement We have a general rollercoaster design- a hill and a perfect circle loop, the hill is 55m high and the loop has a radius of 20m. What is the force exerted on the passenger seat at the very top of the loop? a. 300 b. 500 c. 750 d. 1000 e. 0 Homework Equations...

Homework Statement 1000kg rollercoaster starts from point A on a frictionless track with the profile shown below. c) Determine the rollercoaster's speed at point B? <-- the point on the loop itself Will it work if I apply Conservation of Energy, being: from A, Ek is 0 (Starting...

im doing this eperiment on rollercoasters and i was wondering if loop radius effects the vehicle; like if the loop was to small will it make it through? or if the loop was to big will it make it or just simply fall off? :) THANKYOU

Homework Statement Rollercoaster cart (55kg) traveling at a velocity of 5m/s reaches position at top of a rollercoaster hill, 5m high. 1. assuming no friction, what would the speed of the cart be at the bottom of the track? 2. at the bottom, the speedometer of the cart displays a speed of...

Homework Statement I am trying to calculate the speed and force needed to make a marble complete a loop in the rollercoaster that i have been instructed to make. I do not know how to calculate f though. I can not use v=d/t becuase I can't find time until the rollercoaster is built which I...

URGENT: Rollercoaster Experiment Work Equations Needed Homework Statement We have created a very large coaster for a physics experiment and we need to find the following. Two of which are really making us ponder. - potential energy it has at the beginning of the track - work done on...

Homework Statement A car in an amusement park ride rolls without friction around the rack shown in homr1.gif. It starts from rest at point A at a height h above the bottom of the loop. Treat the car as a particle. (a) What is the minimum value of h[I] (in terms of [I]R[I]) such that the car...

Homework Statement A block of mass m = 1.62 kg slides down a frictionless incline as in the figure(link at the bottom). The block is released at a height of h = 3.91 m above the bottom of the loop. (a) What is the force of the inclined track on the block at the bottom (point A)? (b) What...

Homework Statement The diagram shows part of the track of aroller coaster ride, which has been modeled as numbner of straight lengths of track. The roller coaster's carriages are modeled as a particle of mass 400kg which can negotiate bends A, B, C and D without any loss of speed. The speed...

Homework Statement A rollercoaster car is going over a hill, with a person sitting with -no- restraints. The velocity of the car and radius of the hill are such that the centripetal acceleration of the cart is 15 m/s^2. What is the relative g environment (for the rider) and how many g's does...

Homework Statement -------------------------------------------------------------------------------- I am stuck with this question about a roller coaster going into the loop-the-loop situation. So here is the question, friction between the coaster and the track is negligible. Consider a...

Homework Statement Calculate the acceleration of the train during the trip down the first hill Time for train to go from top of hill to bottom:3.5 s Time for train to pass point at top of hill 1.5s Time for train to go from bottom to top of first hill:7 s Time for train to pass point of...

http://img7.imageshack.us/img7/9297/masteringphysicsq1.jpg - screenshot of the question 2. ok the first question asks for the normal force at the top, I'm pretty sure the normal force at the top is (mv^2)/r - mg = ( (51kg * v^2 ) / 18m) - mg to get the velocity i went...

Hey everyone. I'm working on a project that will incorporate a wireless accelerometer on a model rollercoaster. My issue is that we wish to take the accelerometer data and integrate it to give us our velocity through any part of the ride. This in turn will help us determine losses, etc. My issue...

Hello! I was hoping somebody could help me with these two problems: A roller-coaster has a first hill 75.2 meters tall. Immediately after this hill, the roller coaster skims along the ground, then ascends to a second hill 47.8 m tall. If the load limit is 1067.9 kg, how fast is it going at...

Homework Statement 1. A roller coaster car of mass 1500kg starts a distance H =23m above the bottom of a lopp 15m in diameter. If friction is negligible, the downward force of the rails on the car when it is upside down at the top of the loop is ? 2. Lou is trying to kill mice by swinging a...

Homework Statement Figure 4 shows a partial profile of a roller-coaster ride. Friction and air resistance are negligible. Determine the speed of the coaster at position C if the speed at the top of the highest hill is (a) zero and (b) 5.00m/sFigure 4 (description) Point A is the highest point...

Homework Statement Six roller-coaster carts pass over the same semicircular "bump." The mass M of each cart (including passenger) and the normal force n of the track on the cart at the top of each bump are given in the figures. Rank the speeds (from largest to smallest) of the different carts...

Heres the problem http://i14.photobucket.com/albums/a322/guitaristx/rollercoaster.jpg heres the work I completed, I solved the first part for A on page 1 http://i14.photobucket.com/albums/a322/guitaristx/rollerwork.jpg But for solving after C on the downslope, I am not as confident...

Just for the technical side i like to watch air crash investigation, it has all ways been an interest to me as to how things can fail, but i seem to be getting all sissy and weeping watching the programs, surly this not natural for a male.

OK, in designing and building our rollercoaster, we've been using this "food grade" plastic tubing to do the vertical loops and whatnot, hanging/suspending the loops and track from posts on the side and a top rail system. We finished a bunch of loops, got the system to work just fine, then we...

Hi, I've posteed about this rollercoaster already, so some of you may or may not recognize the whole idea but basically I have to construct a miniature rollercoaster for a ball bearing to run through. Now, my question here is much much differnt. I'm not looking for ideas or design tips, but...

Physics Rollercoaster-- Simple electric circuit Hi all, I'm working on my physics rollercoaster project for grade 11 and I need a simple electric circuit to incorporate into it for more marks. At first I was thinking a circuit to bring the ball back up a hill when it reached the bottom but...

Hi, I'm supposed to constuct a small rollercoaster using any material i want... I will be using tubing/hosing. A marble is what will be running through it. Now, what i am looking for is a few things that will help me build it to spec for the class. It needs to be at least a 90 second ride. In...

Homework Statement A roller coaster is just barely moving as it goes over the top of one hill. it rolls nearly frictionless down the hill and then up over a lower hill that has a radius of curvature 15m. How much higher must the first hill be than the second if the passengers are to exert no...