Stopping distance Definition and 98 Threads

Homework Statement The maximum straight-line deceleration of a racing car under braking is 5 m s-2. What is the minimum stopping distance of the car from a velocity of 108 km h-1? Homework Equations ½ V x t The Attempt at a Solution V = 108km/h=30m/s t = 30/ 5 = 6 m s-2...

Homework Statement It takes a minimum distance of 41.14 m to stop a car moving at 11.0 m/s by applying the brakes (without locking the wheels). Assume that the same frictional forces apply and find the minimum stopping distance when the car is moving at 25.0 m/s. Homework Equations I'm...

Homework Statement A 1500 kg automobile travels at a speed of 110 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes and slides to a stop. a) What is his stopping distance on dry pavement (mu = 0.85)? b) What is his stopping distance...

Why is it that a vehicle travels further when skidding with locked wheels than when decelerating with rolling, braked wheels in conventional, non-abs vehicles.

Stopping Distance Grade 11 Physics Help Needed -- URGENT! Yatin was driving at 90.0km/h when he saw the light turn yellow at an intersection located 75.0m ahead. Yatin used 0.400s to make up his mind, and then braked at 5.00m/s2 until he stopped. What was his stopping distance? Did Yatin make...

Homework Statement If the coefficient of kinetic friction between tires and dry pavement is 0.800, what is the shortest distance in which an automobile can be stopped by locking the brakes when traveling at 27.9 m/s? Take the free fall acceleration to be g = 9.80 m/s^2. On wet pavement...

1. Need help with daughters physics...been 35 yrs since I was in class. 100kg car moves at speed of 29.3m/s on horizontal road Static CoF = 0.145 Kinetic CoF = 0.1015 Acceleration of gravity = 9.8m/s squared Road is wet Neglect Reaction time of driver What is shortest possible stopping...

Homework Statement If the speed of a car is increased by 50%, by what factor will the minimum braking distance be increased assuming all else is the same? Ignore the driver's reaction time. Homework Equations W = Fd \cdot cos\theta W = \Delta{E_k} The Attempt at a Solution...

a 25000kg train travel down a track at 18m/s. a cat wander onto the track 45m ahead of train, causing the conductor to slam on the brakes. The train skids to a stop. If the brakes can provide 75,000 Newtons of friction, will the conductor have enough stopping distance to avoid hitting the cat?

a 25000kg train travel down a track at 18m/s. a cat wander onto the track 45m ahead of train, causing the conductor to slam on the brakes. The train skids to a stop. If the brakes can provide 75,000 Newtons of friction, will the conductor have enough stopping distance to avoid hitting the cat?

Homework Statement a truck of mass 2000 kg traveling 20 m/s to the right carries a load of mass 500 kg positioned 3 meters behind the driver. The load is kept on the truck by friction, and the coefficient of friction between the load and the bed of the truck is 0.5. What is the shortest...

Stopping Distance + Reaction Time Problem ---> Physics beginner Homework Statement A car is traveling at 80km/h, and brakes with a reaction time of .5 seconds. The car decelerates at 8m/s/s, determine the stopping distance of the car. Homework Equations - V1 = V0 + at - D = V0t +...

If the stopping distance with kinetic to static friction is: d=vi2/2ukg Then, What is the stopping distance equation on an inclined plane?

Homework Statement Two objects have different masses, but the same momenta. If you stop them with the same retarding force, which one will stop in the shorter distance. The heavier or lighter one? Or will both have the same distance? Homework Equations The Attempt at a...

Homework Statement Bobsled A bobsled run leads down a hill as sketched in the figure above. Between points A and D, friction is negligible. Between points D and E at the end of the run, the coefficient of kinetic friction is µk = 0.4. The mass of the bobsled with drivers is 210 kg and it...

Hi, There is a cyclist rolling but not peddelling, so friction will eventually cause him to stop. You don't know a start speed, but Every 10 metres a time reading is taken to see how long it took him to travel that last ten metres so an acceleraton can be calculated relative to when...

1. A car leaves skid marks 85 meters long. It slows down at a rate of 4m/s^2. How fast was the car traveling? Again, totally confused. Don't know where to start.

well I'm struggling with a level physics and need some help with a new topic area we're studying the problem is a moving car t velocity of 20 ms(-1) brakes to a standstill in a distance of 40m, a child of mass 15kg is sitting in a forward facing child car seat fitted to the back-seat of...

[b]1. Homework Statement It takes a minimum distance of 66.64 m to stop a car moving at 14.0 m/s by applying the brakes (without locking the wheels). Assume that the same frictional forces apply and find the minimum stopping distance, when the car is moving at 32.0 m/s. The Attempt...

Homework Statement The minimum stopping distance for a car traveling at a speed of 30 m/s is 60 m, including the distance traveled during the driver's reaction time of 0.50 s. (a) What is the minimum stopping distance for the same car traveling at a speed of 60 m/s? m Homework...

Homework Statement Determines the relationship between velocity and stopping distance linking this to the force applied on the passenger or pedestrian, quantitatively. Homework Equations The Attempt at a Solution I have not found any so please provide relevant equations and...

Kinematics-- Stopping distance Homework Statement The minimum stopping distance for a car traveling at a speed of 30 m/s is 60 m, including the distance traveled during the driver's reaction time of 0.50 s. What is the minimum stopping distance for the same car traveling at a speed of 40...

The concept of ultralight vehicles is intended to allow greater fuel efficiencies in part by the use of composite structures to reduce mass by 2 or 3x. In several discussions of these vehicles I have seen and heard mention of the supposed additional safety benefit of shorter stopping...

Homework Statement Hi,our teacher has just given us piece of coursework like two weeks before exams. This piece seems hadrer than the iothers and i really need some help! For the krux of it I need to know the physics behind stopping distance being related to speed. Can anyone offer some help?

Problem: A car is traveling up a 15 degree slope at a speed of 35.0 m/s when the driver slams on the brakes and skids to a halt. The coefficient of kinetic friction between the tires and road is 0.800. Find the cars acceleration and the stopping distance. I found the acceleration and was...

Homework Statement The coefficent of static friction between the floor of a truck and a box resting on it is 0.39. The truck is traveling at 87.8 km/hr. What is the least distance in which the truck can stop and ensure that the box does not slide? Homework Equations Fs=Us*N The...

Hello all, I am new to the forum and to learning physics. I was involved in a BAD motorcycle accident on November 10th, 2006 that resulted the amputation of my left foot. The accident sparked my interest in physics. I am trying to figure out exactly how fast I was going when I impacted the...

[SOLVED] Minimum Stopping Distance Homework Statement The minimum stopping distance for a car traveling at a speed of 30m/s is 60m, including the distance traveled during the driver's reaction time of 0.50s. a.What is the minimum stopping distance for the same car traveling at a speed of...

How do i work out the total stopping distance for a car at 80mph given that: SPEED ... TOTAL STOPPING DISTANCE 20mph ... 12m 30mph ... 23m 40mph ... 36m 50mph ... 53m 60mph ... 73m 70mph ... 96m Note that mph denotes miles per hour and m metres The above figures are widely agreed on...

The driver of an 1800kg car traveling at 29.0m/s slams on the brakes, locking the wheels on the dry pavement. The coefficient of kinetic friction between rubber and dry concrete is typically 0.600. Find the stopping distance ive been trying to this problem forever and i know that Its just I...

Homework Statement Two trains, one traveling at 74.00 km/h and the other at 148.00 km/h, are headed toward one another along a straight, level track. When they are 938 m apart, each engineer sees the other's train and applies the brakes. The brakes decelerate each train at the rate of 1.0...

The minimum stopping distance for a car traveling at a speed of 30 m/s is 60 m, including the distance traveled during the drivers reaction time of 0.560 s. what is the min. stopping distance for the same car traveling at a speed of 38.0 m/s? tried to use this equation v^2 - u^2 = 2 a s...

Homework Statement a muon moving in a straight line enters a region w/ speed of 5 x 10^6 m/s. it then slowed down at a rate of 1.25 m/s^2. how far does the muon take to stop?? Homework Equations 2ad + square of initial velocity = square of final velocity The Attempt at a...

Homework Statement If the coefficient of kinetic friction between tires and dry pavement is mu_k, what is the shortest distance in which an automobile can be stopped by locking the brakes when traveling at v? On wet pavement the coefficient of kinetic friction may be only mu_wet. How fast...

A 1500-kilogram automobile travels at a speed of 90 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes , and the car skids to a stop. What will the stopping distance be for (a) dry pavement and (b) wet pavement?

Why does mass have no effect on stopping distance?

Three cars (cars F, G, and H) are moving with the same velocity, and slam on the brakes. The most massive car is F, and the least massive is H. Assuming all 3 cars have identical tires, which car travels the longest distance to skid to a stop? Will they all travel the same distance in...

I am having a lot of trouble with this problem: A car is traveling at 45.0 km/h on a flat highway. If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? I know it uses the delta X kinematics equation, so I...

Hi Another question It says: A car is traveling at 72km/hr. At a certain instant its brakes are applied to produce a nonconstant deceleration of s"(t)=-t(in m/s^2) How far does the car travel before coming to rest? Now there's a lot of questions like this in the book, however they use a...

ok so i am studying for finals...i mean who isn't and i have a couple questions...i got them wrong previously so maybe ya'll can help me firgure them out...ok sally is riding her bicycle on a path when she comes around a corner and sees that a fallen tree is blocking the street 42 meters...

Here it comes, I have a frictiongrade who is 0,45 A car who is driving in 18m/s and mass of the car 1200kg For the Frictionpower it is : 0,45 * (mg) = 5,5 kN And how do I calculate the meters the car travels until it stops?

I have gotten stuck on this problem because I can't figure out the formula to solve it so really all i need is the formula. I've read the book but i have this class online and have no instructor...please help if you can. Heres the Problem: A load of steel with a mass of 6000 kg rests on a...

I am having a huge problem with this physics problem...I just can't figure it out. Please help me if you can. Heres the problem: A load of steel with a mass of 6000 kg rests on a flatbed of a truck. It is held in place by metal brackets that can exert a maximum horizontal force of 8000 N. When...

A load of steel of mass 6000kg rests on the flatbed of a truck. It is held in place by metal brackets that can exert a maximum horizontal force of 8000 N. When the truck is traveling 20 m/s, what is the minimum stopping distance if the load is not to slide forward into the cab?

I don't actually have a specific homework question, but I'm wondering if anyone could explain to me how you solve a stopping distance problem. I've encountered these questions in very different ways, once with very little information given, and one with a considerable amount of calculating to...

Hello everyone this is my first time in the forum and I'm actually having lot of trouble with my Physics homework. Hope someone can help me. Here's one of the problems and thanks in advanced. If the coefficient of kinetic friction between tires and dry pavement is 0.800, what is the shortest...

I'm trying to work out a problem involving the stopping distance of a skiier, and I thought it was a straightforward problem but I've gone wrong somewhere. Determine the stopping distance for a skier moving down a slope with friction with an initial speed of 22.2 m/s. Assume μk=0.173 and...

A 680.0 kg car traveling on a level road at 27.0 m/s (60.5 mi/hr) can stop, locking its wheels, in a distance of 61.0 m (200.1 ft). Find the size of the horizontal force which the car applies on the road while stopping. Correct, computer gets: 4.06E+03 N now: Find the stopping distance...