Friday

December 2, 2016
Number of results: 86,044

**physics**

A car leaves skid marks 90 long on the highway in coming to a stop. Assuming a deceleration of 3.5m/s^2, estimate the speed of the car just before braking.

*July 5, 2011 by izzy*

**Physics**

In coming to a stop, a car leaves skid marks 88 m long on the highway. Assuming a deceleration of 7.50 m/s2, estimate the speed of the car just before braking.

*August 30, 2012 by Carlee*

**physics**

In coming to a stop, a car leaves skid marks 77 long on the highway Assuming a deceleration of 7.20 , estimate the speed of the car just before braking

*September 11, 2012 by Anonymous*

**physics**

In coming to a stop, a car leaves skid marks 77 long on the highway Assuming a deceleration of 7.20 , estimate the speed of the car just before braking

*September 11, 2012 by Anonymous*

**Physics**

In coming to a stop, a car leaves skid marks 97.0 m long on the highway. Assuming a deceleration of 6.60 m/s2, estimate the speed of the car just before braking. (in m/s)

*January 19, 2015 by Madison*

**physics 1**

In coming to a stop a car leaves skid marks 92m long on the highway. Assuming a decceleration of 7.00m/s^2, estimate the speed of the car just before braking.

*September 13, 2010 by john*

**Physics**

a car leaves skid marks 84 m long on the highway. Assuming a deceleration of 7.50 m/s2, estimate the speed of the car just before braking.

*September 19, 2011 by Shay*

**Physics Part A HELP!!**

4.) In coming to a stop, a car leaves skid marks 80m long on the highway. Assuming a DEceleration of 7.00 m/s^2 (m/s/s), estimate the speed of the car just before breaking. 6.) A car traveling @ 90km/h strikes a tree. The front end of the car compresses and the driver comes to...

*December 14, 2015 by Jess*

**Physics**

A car leaves skid marks 72m in length. The deceleration is 7.2m/s^2. What is the speed of the car before braking?

*January 23, 2015 by David*

**Physics**

Police find skid marks 180 meters long on a highway where a car made an emergency stop. Assuming that the deceleration was a = 10 m/s¶ (about the maximum for dry pavement), how fast was the car traveling before the brakes were applied?

*November 14, 2013 by lee*

**VARIATION- ALGEBRA 2**

The length of skid marks a car makes when braking varies directly with the square of the speed of the car. If a car traveling 25 mph leaves skid marks 30 ft long, how long would the skid marks be if the car is traveling 40 mph??

*March 5, 2014 by Amy*

**Zeeland WEST**

In a car accidnet involving a sports car, skid marks as long as 290 m were left by the car as it decelearted to a complete stop. The police report cited the speed of the car before breaking as beeing in excess of 100mph 161 km/m. Suppose that i took 10 seconds for the car to ...

*September 29, 2010 by Abrahm*

**calc**

a) A car is traveling at 50 mi/h when the brakes are fully applied, producing a constant deceleration of 40 ft/s^2. What is the distance covered before the car comes to a stop? b) A car braked with a constant deceleration of 40 ft/s^2 and produced skid marks measuring 160 feet...

*November 22, 2009 by Jill*

**Science **

At an accident scene, 276-m long skid marks are found on the road. If the car that made these skid marks can decelerate at –9.8 m/s2, how fast was the car going before braking?

*November 3, 2011 by Ray*

**Physics**

Police find skid marks 60 m long on a road showing where a car made an emergency stop. Assuming that the deceleration was -10m/s2, how fast was the car going?

*February 9, 2014 by Jeff*

**Physics**

Police find skid marks 66 m long on the highway showing where the car made an emergency stop. Assuming that the acceleration was -10 m/s2 (about the maximum for dry pavement), how fast was the car going?

*September 5, 2011 by Katie*

**Physics**

Police find skid marks 65.0 m long on a highway showing where the car made an emergency stop. Assuming the acceleration was -10.3 m/s^ ( about the maximum for dry pavement) how fast was the car going?

*September 19, 2015 by Tyler*

**Physics**

A car will skid to a halt at a uniform rate of -9.4 m/s^2. If you measure skid marks that are 34 m long, with what speed was the car going just before the driver slammed the brakes?

*October 4, 2016 by Dan*

**Physics**

A car is travelling along a highway with a speed of 25 m/s when the driver sees an obstruction 1.80*10^2 m directly ahead. It takes the driver 0.80s to react and begin braking. a) How far does the car travel before it begins to slow down? b) How long will it take the car to ...

*March 4, 2013 by Mike*

**Physics**

Police examine the scene of an accident involving two cars, which is parked. The skid marks of the moving car, which nearly came to a stop before the collision, is 80 meters long. The coefficient of kinetic friction between rubber and the pavement is about .80. Estimate the ...

*November 25, 2012 by Tim*

**Physics**

A sports car skids to a stop, leaving skid marks 290 m long. If the coefficient of kinetic friction between tires and pavement is 0.80, how fast was the car going before the skid?

*October 4, 2015 by Luis*

**math**

When a car makes an emergency stop on dry road, it leaves skid marks. The speed S, in miles per hour, of the car when brakes were applied is related to the length L, in feet, of the skid mark. Functional notation is needed, please help.

*January 31, 2015 by Marcquillia*

**calculus**

A car braked at a constant deceleration of 45 ft / s2, producing a skid mark measuring 115 feet before coming to a stop. How fast was the car travelling when the brakes were first applied?

*November 16, 2010 by Joey*

**calculas**

A car braked at a constant deceleration of 45 ft / s2, producing a skid mark measuring 105 feet before coming to a stop. How fast was the car travelling when the brakes were first applied?

*December 4, 2011 by jordan*

**Physics**

car leaves skid mark 72m in length with a deceleration speed of 7.20m/s^2. what was the initial speed prior to braking?

*January 24, 2015 by David*

**AP Physics**

To stop a car, you require first a certain reaction time to begin braking. Then the car slows under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 82.5 km/h, and 24.4 when the ...

*September 9, 2007 by Kristen*

**mathematics**

A car braked with a constant deceleration of 45ft/s^2 producing skid marks measuring 55 ft before coming to a stop. How fast was the car traveling when the brakes were first applied? Please round the answer to the nearest hundredth. Vo= ft/s Vintial^2 - Vfinal^2= -2*...

*April 14, 2007 by Julia*

**Alg2**

Help w/Word Prob: LAW ENFORCEMENT A police accident investigator can use the formula s=2√5l to estimate the speed=s of a car in miles per hour based on the length=l in feet of the skid marks it left. How fast was a car traveling that left skid marks 120 feet long?

*December 4, 2011 by Rock*

**mechanical science**

11. In an accident a freeway sports car made skid marks 200 m long along the pavement. The police estimated the braking acceleration of the car to be – 0.8g under the road conditions prevailing. Determine the speed of the sports car when the brakes were applied.

*December 20, 2012 by anshuman kumar*

**Physics**

During the investigation of a traffic accident that occurred in a 25 m/s zone, police find skid marks 60.0 m long corresponding to the distance the car traveled while braking to a halt. They determine that the coefficient of friction between the car's tires and the roadway to ...

*May 13, 2016 by Jonas*

**science!**

1. A plane accelerated from a speed of 2.0 m/s at the rate of 3.0 m/s2 over a distance of 530 m. What is its speed after traveling this distance? 2. A jet plane must achieve a velocity of 71 m/s for takeoff. From rest and with a 1,000 m long runway, what must the acceleration ...

*November 3, 2011 by ray*

**Physics **

A car is driving at a speed of 66.0 km/h toward an intersection just as the light changes from green to yellow. The driver has a reaction time of 0.750 s and the magnitude of the braking acceleration of the car is 5.50 m/s2.Find the minimum distance the car travels before ...

*September 13, 2016 by Alison Zook*

**Math**

The police can determine the speed a car was traveling from the length of the skid marks it leaves. The function they use is S = f(L) = 2sqrt(5L) where S is speed (mph) and L is the length of the skid marks (feet) (a) If skid marks of length 125 feed are measured, what was the...

*November 21, 2014 by Dawn*

**physics**

A car initially traveling at 31.0 m/s undergoes a constant negative acceleration of magnitude 2.00 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires have radii of 0.330 m...

*March 27, 2010 by Kelsey*

**Physics**

To stop a car, you require first a certain reaction time to begin braking. Then the car slows under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 80.0 km/h, and 24.4 m when the ...

*October 3, 2010 by Bob*

**psychics**

1. (a) A frictionless car of mass 1.5 tonnes travels uphill along a slope at 20º to the horizontal for 0.5 km at 20 km per hour. (i) How much work does the engine do on the car? (ii) What power does the engine supply? (b) The car the rolls back down the hill with the engine ...

*May 2, 2013 by Serkhref*

**Physics**

A car initially traveling at 33.4 m/s undergoes a constant negative acceleration of magnitude 1.80 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires have radii of 0.330 m...

*November 28, 2009 by Ed*

**Physics**

A car initially traveling at 33.4 m/s undergoes a constant negative acceleration of magnitude 1.80 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires have radii of 0.330 m...

*November 28, 2009 by Ed*

**math**

Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the distance of the skid ...

*March 1, 2012 by krysta*

**math**

Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the distance of the skid ...

*March 3, 2012 by alyssa*

**algebra**

Use the following situation to answer the next four questions. The formula for these questions came from the police department. They use this formula to determine the speed at which the car was going when the driver applied the brakes, by measuring the distance of the skid ...

*March 3, 2012 by alyssa*

**physics**

Marks: 1 A car merges onto the highway from rest in 10 seconds. The final speed of the car is 60 mph. Estimate the acceleration of the car.

*May 18, 2013 by ben*

**alg**

1. (20 points) Police use the equation to estimate the speed (s) of a car, in miles per hour, based on the length (x), of its skid marks upon sudden braking on dry asphalt. a. Solve this equation for d. b. A motorist is involved in an accident. The skid marks are measured to ...

*July 23, 2011 by patricia*

**Physics**

You are driving down the highway late one night at 20 m/s when a deer steps onto the road 35 m in front of you. Your reaction time before stepping on the brakes is 0.50 s , and the maximum deceleration of your car is 10 m/s2 . How much distance is between you and the deer when...

*May 16, 2014 by Harvey*

**Physics**

A 1500kg car skids to a halt on a wet road where μk= 0.53. How fast was the car traveling if it leaves 62-m-long skid marks?

*October 28, 2009 by Angela*

**physics**

A train braking with constant deceleration covers 1km in 20s, and a second kilometre in 30s. Find the Deceleration. Wgat further distance will it cover before coming to a stop. and how long will it take?

*June 18, 2011 by ivy*

**physics**

A certain cable car is San Francisco can stop in 10 s when traveling at maximum speed. On one occasion, the driver sees a dog a distance d m in front of the car and slams on the brakes instantly. The car reaches the dog 7.78 s later, and the dog jumps off the track just in ...

*September 15, 2011 by ashley*

**Differential Equations**

A car is traveling at 70 mph skids 240 ft after it's breaks are suddenly applied. Assuming that the cars breaking system provides a constant deceleration, find that deceleration. How long did it take the car to stop?

*June 19, 2011 by Jenna*

**physic**

Hi!Need help please. Question:A car initially traveling at 24.0 m/s undergoes a constant negative acceleration of magnitude 2.10 m/s2 after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and ...

*November 14, 2009 by Chan*

**physics**

you are driving your new car 14.0m/s east when you slam on your brakes to avoiavoid having your first collision. The force of friction on your car tires is 1.5kN and the combined mass of your car is 1200kg. Detemine the (a). direction of the frictional force causing your car ...

*October 8, 2012 by paru*

**Physics**

A car with good tires on a dry road can decelerate at about 5.0m/s/s when braking. If the car is traveling at 55miles/hour, how much time does it take the car to stop? 55 mph = 80.7 ft/s = 24.6 m/s Divide the initial speed by the deceleration rate to get the time required. (24...

*September 18, 2006 by Savannah*

**PHYSICS**

The driver of a car traveling at 25.0 m/s applies the brakes and undergoes a constant negative acceleration of magnitude 2.50 m/s2. How many revolutions does each tire make before the car comes to a stop, assuming that the car does not skid and that the tires have radii of 0....

*January 15, 2015 by Taylor*

**Physics**

A driver in a car, originally moving at 13.1 m/s, applies the brakes until the car comes to a stop. The car moves a distance of 34.1 m while braking. How much time did it take for the car to stop? Assume constant acceleration during braking.

*October 4, 2016 by Kate*

**Physics**

A 1500 kilogram car skids to a hold on a wet road where the coefficient of kinetic friction is 0.5. How fast was the car traveling if it leaves 65 meter long skid marks?

*November 9, 2016 by Anonymous *

**physics**

A driver of a 7100 N car passes a sign stating "Bridge Out 30 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume that the negative ...

*October 18, 2009 by Steve*

**physics**

A driver of a 7550 N car passes a sign stating "Bridge Out 25 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume that the negative ...

*October 19, 2010 by jesse*

**physics**

A driver of a 7550 N car passes a sign stating "Bridge Out 25 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume that the negative ...

*October 19, 2010 by jesse*

**physics**

A driver of a 7550 N car passes a sign stating "Bridge Out 25 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume that the negative ...

*October 19, 2010 by jesse*

**PHYSICS**

A driver of a 7400 N car passes a sign stating "Bridge Out 30 Meters Ahead." She slams on the brakes, coming to a stop in 10 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume that the negative ...

*October 24, 2010 by spencer*

**physics**

a car traveling at 30.0m/s undergoes a constant negative accerleration of magnitude of 2.00m/s^2 when the brakes are applied. how many revolutions does each tire make before the car comes to a complete stop,assuming thaat the car does not skid and that the tires have radii of ...

*February 23, 2009 by nay*

**math**

Can someone please check my math questions? My answers are under the questions... I would really appreciate any help Questions~ 16. A car’s speed before a sudden stop can be estimated by the formula S = √(30gk) , where S = speed of the car in mph, g = drag factor, and ...

*October 14, 2015 by Abby *

**Physics**

To stop a car, first you require a certain reaction time to begin braking. Then the car slows down at a constant rate. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 85.0 km/h, and 24.4 m when the initial speed is ...

*March 5, 2008 by Lance*

**physics**

You are driving a car 33 down the road. The stoplight in front of you suddenly turns red and you slam on the brakes, skidding to a halt. You get out of the car and measure the skid marks made by your tires to be 23.5 meters (Assume positive x to be in the forward direction) ...

*January 11, 2013 by Ashley*

**Algebra**

The formula r =2 sqrt.5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 60 mph?

*March 31, 2014 by Pam*

**Algebra**

The formula r=2sqrt(...)5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 70mph?

*April 2, 2014 by George*

**Physics**

A car skidded on a roadway that has a coefficient of friction with the road of 0.7. A police officer measured the skid marks and noted them to be 100 feet long. Two years later at trial, the lawyer for the driver argues that the officer did not measure the skid marks correctly...

*April 28, 2015 by Hassan*

**physics**

You are driving a car 35mi/h down the road. The stoplight in front of you suddenly turns red and you slam on the brakes, skidding to a halt. You get out of the car and measure the skid marks made by your tires to be 28.5m meters. (Assume positive x to be in the forward ...

*September 1, 2013 by JIll*

**Physic **

6. A car is moving along a straight road at 60 mph [26.7 meter/sec ]. The driver makes slams on his breaks locking them so that the car skid s to a stop. Assume a constant braking force due to friction , and a kinetic friction coefficient of 0.70 between the tires and the road...

*October 28, 2014 by Anonymous*

**Math 117**

The formular r= 2 cube root5L can beusedto approximate the speed r,in mile per hour,of a car that has skid marks of lenght L,in feet. How far will a car skid at 60 mph.

*February 12, 2012 by Joseph*

**Physics**

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 3.5 m/s2 for 3.6 seconds. It then continues at a constant speed for 10.1 seconds, before applying the brakes such that the ...

*January 24, 2011 by Hayls*

**Physics**

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5 m/s2 for 4.2 seconds. It then continues at a constant speed for 11.1 seconds, before applying the brakes such that the car...

*January 21, 2015 by Isaiah*

**Algebra 2 **

The Formula s= sqrt 30fd can be estimated the speed of s, in miles per hour that a car is traveling when it goes into a skid, where f is the coefficient of friction and d is the length of the skid marks in feet. Kody skids to a stop on a street with a speed limit of 35 mi/h. ...

*January 21, 2013 by Ana*

**physics**

A police officer investigating an accident estimates that a moving car hit a stationary car at 24km/h . If the moving car left skid marks 45m long, and if the coefficient of kinetic friction is 0.71, what was the initial speed of the moving car? Express your answer using two ...

*February 16, 2015 by Anonymous*

**physics**

A driver of a car traveling at 15.9 m/s applies the brakes, causing a uniform deceleration of 1.7 m/s2. How long does it take the car to accelerate to a final speed of 13.0 m/s? Answer in units of s. b) How far has the car moved during the braking period? Answer in units of m.

*March 20, 2011 by maria*

**college math**

Braking distance The braking distance y in feetthat it takes for a car to stop on wet ,level pavement can be estimated by y = 1/9 x^2, where the x is the speed of the car in miles per hour Find the speed associated with with each braking distance. (a.) 25 feet (b.) 361 (c.) 784

*April 28, 2011 by Shin*

**science**

A car is travelling at 20m/s along a road. A child runs out into the road 50m ahead and the car driver steps on the brakes pedal. What must the car’s deceleration if the car is to stop just before it reaches the child?

*June 8, 2015 by abhishek*

**physics**

In a panic-stop, a car's brakes produced an acceleration of -8.0 m/s2 (or a deceleration of 8.0 m/s2). If you are traveling at 35 m/s, your speed after braking for 3.0 s will be

*July 31, 2014 by kjonl*

**physics**

a car moving at 15 meters per second skids to a stop in 20 meters. if the car travels at 45 meters per second, how far will it skid, assuming the same constant braking force

*December 12, 2010 by Anonymous*

**physics**

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 4.6 m/s2 for 4.4 seconds. It then continues at a constant speed for 8.5 seconds, before applying the brakes such that the car...

*September 13, 2011 by a*

**Physics**

A car moving initially at a speed of 80 km/h and weighing 13,000 N is brought to a stop ina distance of 61 m. Find(a) the braking force and (b) the time required to stop. Assuming the same braking force, find (c) the distance and (d) the time required to stop if the car were ...

*February 24, 2014 by Anonymous*

**Physics **

Instructions: Read the following paragraph carefully. Then use what you know about momentum, work, and energy to answer the following questions. Be sure to show your work. You are a traffic accident investigator. You have arrived at the scene of an accident. Two cars of equal ...

*December 15, 2014 by Annet*

**physics**

A driver of a 7.50 N car passes a sign stating "Bridge Out 30 Meters Ahead." She slams on the brakes, coming to a stop in 10.0 s. How much work must be done by the brakes on the car if it is to stop just in time? Neglect the weight of the driver, and assume that the negative ...

*October 21, 2007 by Anonymous*

**calculus antiderivation**

A car traveling 60 mi/h along a straight road decelerates at a constant rate of 11 ft/s2. (a) How long will it take until the speed is 45 mi/h? (b) How far will the car travel before coming to a stop?

*November 20, 2016 by hamza*

**physics **

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5.5 m/s2 for 4.9 seconds. It then continues at a constant speed for 6.7 seconds, before applying the brakes such that the car...

*January 27, 2014 by kayle*

**Physics **

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with acceleration -5.40 m/s2 for 4.40 s, making straight skid marks 63.1 m long ending at the tree. With what speed does the car then strike the tree?

*January 22, 2015 by Chad *

**Physics**

A driver of a car traveling at 16.6 m/s applies the brakes, causing a uniform deceleration of 3.0 m/s^2. How long does it take the car to accelerate to a ﬁnal speed of 12.1 m/s? Answer in units of s part 2- How far has the car moved during the braking period? Answer in ...

*September 29, 2012 by neko alice*

**physics**

The driver of a car traveling at 30 m/s needs to quickly reduce the car’s speed to 20m/s to round a curve in the highway. If the car’s deceleration has a magnitude of 6.0 m/s2, how far does it travel while reducing its speed?

*October 9, 2010 by lee*

**physics**

please somebdy help me solveing this. Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 4.3 m/s2 for 3.3 seconds. It then continues at a constant speed for 14.4 seconds, ...

*September 20, 2014 by atif*

**PHYSICS**

A CAR IS MOVING INITIALLY AT A SPEED OF 50MI/H WEIGHTING 3000LB IS BROUGT TO A STOP IN A DISTANCE OF 200FT FIND THE BRAKING FORCE.AND FIND TIME REQUIRED TO STOP ASSUMING THE SAME BRAKING FORCE..AND FIND THE DISTANCE AND TIME REQUIRED TO STOP IF THE CAR WERE GOING 25MI/H ...

*January 23, 2016 by WASEEM*

**physics**

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with an acceleration of -5.6m/s for 4.20s marking straight skid marks 62.4m long ending at the tree with what speed does the car strike the tree?

*May 4, 2016 by Chansa*

**physics **

The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly with an acceleration of - 5.6m/s for 4.20s marking straight skid marks 62.4m long ending at the tree.With what speed does the car strike the tree?

*May 7, 2016 by Mathews *

**College Physic**

2) A car traveling with 5 m/s encounters a deer. The drivers slams on the breaks, the breaks lock. The car skids to a complete stop on the road ahead (and the deer runs away). Why does the car stop (where does all the kinetic energy it had go)? Find the magnitude of the ...

*March 23, 2012 by Mary*

**physics**

A driver of a car traveling at 14.2 m/s applies the brakes, causing a uniform deceleration of 2.0 m/s 2 . How long does it take the car to accelerate to a ﬁnal speed of 10.7 m/s? Answer in units of s. 002 (part 2 of 2) 10.0 points b) How far has the car moved during the...

*March 31, 2011 by Anonymous*

**Physics**

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 4.8 m/s2 for 4.5 seconds. It then continues at a constant speed for 9.9 seconds, before applying the brakes such that the car...

*January 22, 2011 by Jeel*

**physics**

The brakes are applied to a car traveling on a dry, level highway. A typical value for the magnitude of the car's acceleration is 4.75 m/s2. If the car's initial speed is 32.1 m/s, how long does it take to stop and how far does it travel, starting from the moment the brakes ...

*September 13, 2011 by Nour *

**science**

Instructions: Read the following paragraph carefully. Then use what you know about momentum, work, and energy to answer the following questions. Be sure to show your work. You are a traffic accident investigator. You have arrived at the scene of an accident. Two cars of equal ...

*October 27, 2010 by Anonymous*

**physics**

A car that weighs 1.5 × 10^4 N is initially moving at a speed of 43 km/h when the brakes are applied and the car is brought to a stop in 16 m. Assuming that the force that stops the car is constant, find (a) the magnitude of that force and (b) the time required for the change...

*October 8, 2010 by monnie*

**physics**

A 1000 kg car in neutral gear slow from 15 m/s to a stop in 5.0 s due to the force of friction. A. What was the acceleration of the car. B. What was the car’s initial momentum? C. What was its final momentum? D. What was the change in momentum of the car? E. What was the ...

*October 23, 2011 by Anonymous*

**Calculus**

A car traveling at 72 mph starts braking and decelerates at a constant rate. the car takes 1/9 of a mile to stop. Find, to the nearest half-second, how long it took the car to cover the 1/9 of a mile. I don't need the whole thing done. Just don't know how to start!

*February 16, 2014 by Anonomous*

**physics, please help check**

A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree incline from the ...

*February 21, 2007 by Katrina*