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April 20, 2014

Search: when a driver applies brakes to keep a car going downhill

Number of results: 3,009

physics
A car of mass 1330 kg is traveling at 28.0 m/s. The driver applies the brakes to bring the car to rest over a distance of 79.0 m. Calculate the retarding force acting on the car. (79.0/28.0)*1330 3752.5 I asked before but I wasnt sure if I did it right
Wednesday, April 16, 2008 at 2:37pm by Anonymous

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...
Thursday, March 31, 2011 at 6:42pm by Anonymous

Physics
Two cars are traveling along a straight line in the same direction, the lead car at 22 m/s and the other car at 34 m/s. At the moment the cars are 59 m apart, the lead driver applies the brakes, causing the car to have a deceleration of 1.5 m/s 2 . How long does it take for ...
Sunday, September 25, 2011 at 7:18pm by Grey

physics
The driver of a 1300 kg car, initially traveling at 10.1 m/s, applies the brakes, bringing the car to rest in a distance of 16.5 m. (a) Find the net work done on the car. (b) Find the magnitude and direction of the force that does this work. (Assume this force is constant.) ...
Wednesday, February 22, 2012 at 5:52pm by Henry

physics
a bus is moving downhill at a slope of 5 degree . at the moment when the speed of the bus is 30km/h,the driver spots a deer 30m ahead. he applies the brakes and comes to a stop. the is paralysed by fear and does not move.will the bus stops before reaching it or will it hit the...
Saturday, February 11, 2012 at 9:27am by ash

MECHANICS
CARS A 7B ARE 60 M APART TRAVELLING RESP AT THE CONST SPEED OF 32 AND 24 KPH ON AN ICE COVERED ROAD .KNOWING THAT 45 SEC AFTER DRIVER APPLIES HIS BRAKES TO AVOID OVERTAKING CARB ,THE 2 CARS COLLIDE DETERMINE UNIFORM DECELLERATION OF CAR A RELATIVE VEL OF CARA WRT CARB WHEN ...
Tuesday, November 9, 2010 at 1:52am by HAR!@#$%^&H

physics
This question is typical on some driver's license exams: A car moving at 50km/hr skids 15m with locked brakes.How far will the car skid with locked brakes at 120 km/h?
Monday, February 27, 2012 at 8:09pm by jim

Physics
Two cars are traveling along a straight line in the same direction, the lead car at 24.5m/s and the other car at 29.8m/s. At the moment the cars are 41.4m apart, the lead driver applies the brakes, causing her car to have an acceleration of -2.05m/s2. A) How long does it take ...
Thursday, February 2, 2012 at 12:57am by Alex

Physics
Two cars are traveling along a straight line in the same direction, the lead car at 24.5m/s and the other car at 29.8m/s. At the moment the cars are 41.4m apart, the lead driver applies the brakes, causing her car to have an acceleration of -2.05m/s2. A) How long does it take ...
Thursday, February 2, 2012 at 12:57am by Alex

physics
You're quietly sitting by a street one day, enjoying the sun, when you notice a speeding car traveling at 20 m/s down the street. The driver notices that there's a stop sign in the street and hits the brakes 40 m before the stop sign, coming to a stop right at the sign itself...
Monday, May 20, 2013 at 2:59am by hemant

physics
Two cars are traveling along a straight-line in the same direction, the lead car at 25.0 m/s and the other car at 32.0 m/s. At the moment the cars are 40.0 m apart, the lead driver applies the brakes, causing his car to have an acceleration of -2.20 m/s2. (a) How much time ...
Thursday, October 6, 2011 at 12:09am by Anonymous

physics
Two cars are traveling along a straight-line in the same direction, the lead car at 25.0 m/s and the other car at 32.0 m/s. At the moment the cars are 40.0 m apart, the lead driver applies the brakes, causing his car to have an acceleration of -2.20 m/s2. (a) How much time ...
Thursday, October 6, 2011 at 12:09am by Anonymous

physics
a)Two cars are traveling along a straight line in the same direction, the lead car at 24.5m/s and the other car at 29.6m/s. At the moment the cars are 41.6m apart, the lead driver applies the brakes, causing her car to have an acceleration of -2.00m/s2. How long does it take ...
Thursday, January 23, 2014 at 9:13pm by Cat

physics
A train is speeding along a straight, level track at +20.0 m/s when the engineer applies the brakes, which results in an acceleration of -0.894 m/s2 as long as the train is in motion. How far does the train move during the 70 sec after the brakes are first applied?
Friday, August 24, 2012 at 1:47am by james

Physics
A train is traveling down a straight track at 25 m/s when the engineer applies the brakes, resulting in an acceleration of −1.0 m/s2 as long as the train is in motion. How far does the train move during a 50 s time interval starting at the instant the brakes are applied?
Wednesday, September 11, 2013 at 2:42pm by <3

Physics
A train has a mass of 5.27E+6 kg and is moving at 53.9 km/hr. The engineer applies the brakes, which results in a net backward force of 1.30E+6 N on the train. The brakes are held on for 25.6 s. What is the new speed of the train? How far does it travel during this period?
Sunday, September 22, 2013 at 12:42pm by Kimmy

Physics
A 6110-kg bus traveling at 20.0 m/s can be stopped in 24.0 s by gently applying the brakes. If the driver slams on the brakes, the bus stops in 3.90 s. What is the average force exerted on the bus in both these stops?
Friday, December 9, 2011 at 8:05am by HELP

physics
when maggie applies the brakes of her car, the car slows uniformly from14.3 m/s to 0 m/s in 2.18 s. How far ahead of the stop sign must she apply her brakes in order to stop at the sign? answer in m
Monday, September 30, 2013 at 6:07pm by katy

physics
when maggie applies the brakes of her car, the car slows uniformly from14.3 m/s to 0 m/s in 2.18 s. How far ahead of the stop sign must she apply her brakes in order to stop at the sign? answer in m
Monday, September 30, 2013 at 6:08pm by katy

physics
When Maggie applies the brakes of her car, the car slows uniformly from 15.8 m/s to 0 m/s in 2.25 s. How far ahead of a stop sign must she apply her brakes in order to stop at the sign? Answer in units of m
Sunday, January 22, 2012 at 9:38pm by fghsgsdf

physics
When Maggie applies the brakes of her car, the car slows uniformly from 15.4 m/s to 0 m/s in 2.19 s. How far ahead of a stop sign must she apply her brakes in order to stop at the sign? Answer in units of m
Wednesday, September 26, 2012 at 11:14pm by Anonymous

poe
When Maggie applies the brakes of her car, the car slows uniformly from 15.9 m/s to 0 m/s in 2.43 s. How far ahead of a stop sign must she apply her brakes in order to stop at the sign? Answer in units of m
Sunday, October 7, 2012 at 6:50pm by Sonia

11th grade
When Maggie applies the brakes of her car, the car slows uniformly from 15.4 m/s to 0 m/s in 2.41 s. How far ahead of a stop sign must she apply her brakes in order to stop at the sign? Answer in units of m.
Monday, September 20, 2010 at 6:33pm by Taylor

Physict
This question is similar to some on driver's-license exams: A car moving at 50 km/h skids 15 m with locked brakes. Show that with locked brakes at 150 km/h the car will skid 135 m.
Tuesday, April 8, 2014 at 1:02pm by Jaime

11th grade
When Maggie applies the brakes of her car,the car slows uniformly from 15.4 m/s to 0m/s in 2.41 s.How far ahead of a stop sign must she apply her brakes in order to stop at the sign?Answer in units of m.
Tuesday, September 21, 2010 at 5:38pm by Taylor

Physics
A train has a mass of 5.22 multiplied by 106 kg and is moving at 82.0 km/h. The engineer applies the brakes, resulting in a net backward force of 1.87 multiplied by 106 N on the train. The brakes are held on for 21.0 s.
Sunday, November 28, 2010 at 8:01am by john

Physics
A woman driving at a speed of 23 m/s sees a deer on the road ahead and applies the brakes when she is 210 m from the deer. If the deer does not move and the car stops right before it hits the deer, what is the acceleration provided by the car's brakes?
Wednesday, September 26, 2012 at 6:35pm by James

physics
The engineer of a passenger train traveling at 25.0 m/s sights a freight train whose caboose is 200 m ahead on the same track. The freight train is traveling at 15.0 m/s in the same direction as the passenger train. The engineer of the passenger train immediately applies the ...
Sunday, September 19, 2010 at 9:27pm by Anonymous

physics
The driver of a car, traveling at a constant 25 m/s, sees a child suddenly run into the road. It takes the driver 0.45s to hit the brakes. As it slows, the car has a steady acceleration of 8.5 m/s^2. What's the total distance the car moves before it stops?
Friday, September 27, 2013 at 7:37pm by chris

physics
This question is typical on some driverís license exams: A car moving at 40 km/h skids 12 m with locked brakes. How far will the car skid with locked brakes at 80 km/h? Answer in units of m
Thursday, September 27, 2012 at 9:34pm by LYNN

college physics
a woman driving at a speed of 23 m/s sees a deer on the road ahead and applies the brakes when she is 210m from the deer. if the deer does not move and the car stops right before it hits the deer, what is the acceleration provided by the car's brakes?
Friday, March 29, 2013 at 5:25pm by sue

physics
The driver of the car traveling at a constant 25m/s sees a child suddenly run into the road. It takes the driver 0.45s to hit the brakes. As it slows, the car has a steady acceleration of 8.5m/s©Ł. What the total distance the car move before it stops.
Thursday, December 9, 2010 at 12:17am by apol

physics
A car is traveling 10 m/s when the driver sees a dog in the road. The driver takes 0.7 s to react, then steps on the brakes and slows down at 3.0 m/s2. How far does the car go before it stops? Name the forces, their directions, and the distances involved in the following ...
Thursday, December 1, 2011 at 10:10am by JuJu

school of engineering
A train of mass 200 tonne travelling at 140 km/h applies the brakes fiercely , so that the brakes lock and the wheels slides along the rails.it stops sliding 1000m. calculate. 1. The acceleration. 2. The longitudinal force on the rail. 3. The coefficient of friction between ...
Tuesday, October 15, 2013 at 7:08am by abdul

school of engineering
A train of mass 200 tonne travelling at 140 km/h applies the brakes fiercely , so that the brakes lock and the wheels slides along the rails.it stops sliding 1000m. calculate. 1. The acceleration. 2. The longitudinal force on the rail. 3. The coefficient of friction between ...
Wednesday, October 16, 2013 at 10:43am by abdul

physics
disregard the previous I did not include the first part This question is typical on some driver's license exams: A car moving at 50 km skids 15 m with locked brakes.How far will the car skid with locked brakes at 120 km/h?
Saturday, March 3, 2012 at 6:01pm by Mrs G

physics
a stunt car driver testing the use of air bags drives a car at a constant speed of 25m/s for a total of 100 meters. he applies his brakes and accelerates uniformlu to a stop just as he reaches the wall 50 meters away. SKETCH THE A GRAPH SHOWING POSITION V.S TIME and VELOCITY v...
Thursday, January 20, 2011 at 1:53am by shannon

phyics
If two cars are traveling along a straight road, one behind the other. the first is traveling at a constant velocity of 10 m/s. the second, approaching from the rear, is traveling at 22 m/s. when the second car is 300m behind the first, the driver applies the brakes, ...
Saturday, November 6, 2010 at 7:38pm by billy

physics
A driver of a car traveling at 16.7 m/s applies the brakes, causing a uniform deceleration of 2.5 m/s2. The first question is - How long does it take the car to accelerate to a final speed of 13.9 m/s? For this i got 1.12 and that's correct. The second question is - How far ...
Tuesday, September 6, 2011 at 8:25pm by John

Physics
A train has a mass of 5.22 multiplied by 106 kg and is moving at 70.0 km/h. The engineer applies the brakes, which results in a net backward force of 1.87 multiplied by 106 N on the train. The brakes are held on for 37.0 s. (a) What is the new speed of the train? (b) How far ...
Sunday, October 2, 2011 at 9:34pm by Seth

More Physics
I have NO idea how to do this! any help is great! A car with a mass of 1330kg is traveling at 28m/s. The driver applies the brakes to bring the car to a rest over a distance of 79m. Calculate the retarding force acting on the car. From this i can see that it gives me the Mass:...
Wednesday, December 5, 2012 at 7:40pm by Maggie

school of engineering
A train of mass 200 tonne travelling at 140 km/hour applies the brakes fiercely, so that the brakes lock and the wheels slide along the rails. It stops after sliding 1000m. Calculate: (i) The acceleration, (ii) The longitudinal force on the rails, (iii) The coefficient of ...
Wednesday, October 16, 2013 at 11:20am by abdul

Physics
What is the maximum speed at which a car could be moving and not hit a barrier 35.0 m ahead if the average acceleration during braking is -10.0 m/s2 and it takes the driver 0.90 s before he applies the brakes? subtract from the 35 m the distance during reactiontime (v*.9) so ...
Tuesday, September 4, 2007 at 10:02pm by Sarah

Physics
a driver of a car going 95.0km/h suddenly sees the lights of a barrier 35.0 m aheadd. It takes the driver 95 s before he applies the breaks, and the average acceleraion during breaking is -10.om/s/s does the car hit the barrier?
Wednesday, March 16, 2011 at 12:52pm by Jerry

physics
break up the question into segments a. travels for 7.0 s with a uniform acceleration of +2.3 m/s2 b. then applies the brakes, causing a uniform negative acceleration of -1.0 m/s2. If the brakes are applied for 2.0 s, figure the end velocicty of a, which will be the starting ...
Monday, January 21, 2013 at 2:37am by bobpursley

Physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied, how much can the ...
Sunday, January 13, 2013 at 6:49pm by I'm going to die please help

physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1280 kg automobile traveling at 30.8 m/s comes to a halt after its brakes are applied, how much can the ...
Thursday, March 14, 2013 at 6:56pm by Jayde Larson

Thermodynamic Physics
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1500 kg automobile traveling at 42 m/s comes to a halt after its brakes are applied, how much can the ...
Sunday, January 13, 2013 at 10:25pm by Kristal

Physics
If a car starts from rest and travels for 5.0 seconds with a uniform acceleration of +1.5 m/s2. The driver then applies the brakes for 3.0 seconds, causing a uniform acceleration of - 2.1 m/s2. a) Sketch the velocity vs. time graph for the car and paste your sketch in the ...
Saturday, October 23, 2010 at 8:58pm by grace

Physics
An automobile driver puts on the brakes and decelerates from 30.0 m/s to 0 in 10.0 s. What distance does the car travel?
Friday, December 3, 2010 at 9:47pm by Jesse

language
In this case, the injured driver received payment from his own insurance company. 1)driver received 2)driver, received 3)driver will have received 4)driver receives 5)driver, receives 4
Tuesday, May 11, 2010 at 4:35pm by kayci

Physics
A 13,900 kg truck is moving at 23.5 m/s on a mountain road when the brakes are applied. The brakes FAIL!! Fortunately, the driver sees a deceleration (ouch!) ramp a short distance ahead. This is an incline used by out of control trucks to dissipate their KE by converting it to...
Monday, July 1, 2013 at 7:07pm by justin

physics
An automobile driver puts on the brakes and decelerates from 30.0 m/s to zero in 15.0 s. What distance does the car travel?
Monday, June 7, 2010 at 7:49pm by sarah

physics
The driver of a car going 90.0 km/h suddenly sees the lights of a barrier 35.0 m ahead. It takes the driver 0.75 s to apply the brakes, and the average acceleration during braking is -10.0 m/s2. (b) What is the maximum speed at which the car could be moving and not hit the ...
Friday, November 26, 2010 at 1:46am by javane

Gen physics
A 13,900 kg truck is moving at 23.5 m/s on a mountain road when the brakes are applied. The brakes FAIL!! Fortunately, the driver sees a deceleration (ouch!) ramp a short distance ahead. This is an incline used by out of control trucks to dissipate their KE by converting it to...
Monday, July 1, 2013 at 9:27pm by justin

general physics
A 13,900 kg truck is moving at 23.5 m/s on a mountain road when the brakes are applied. The brakes FAIL!! Fortunately, the driver sees a deceleration (ouch!) ramp a short distance ahead. This is an incline used by out of control trucks to dissipate their KE by converting it to...
Tuesday, July 2, 2013 at 9:35am by ODU

physics repost
A car of mass 1330 kg is traveling at 28.0 m/s. The driver applies the brakes to bring the car to rest over a distance of 79.0 m. Calculate the retarding force acting on the car. same as before just posting again so you wont have to scroll. heres my work KE=1/2*m*v^2 KE=521360...
Wednesday, April 16, 2008 at 8:46pm by Anonymous

physics
A MASS OF A MINUBUS WITH THE DRIVER IS 1 500Kg .ASSUME THAT THE PASSENGERS HAV AN AVERAGE MASS OF 50Kg EACH .THE DRIVER IS MOVING AT A SPEED OF 30m.s WHE HE NOTICES THAT THE TRAFFIC LIGHTS AHEAD TURNED TO RED .HE APPLIES A FORCE OF 9 000N ON THE BREAK PEDAL .HOW LONG WILL IT ...
Tuesday, February 7, 2012 at 12:18pm by VICTOR MACMILLAN

physics
A certain truck can slow at a maximum rate of 4.6 m/s2 in an emergency. When traveling in this truck at a constant speed of 19 m/s the driver spots a large hole in the road 48.2 m in from of his position. The truck continues moving forward at a constant speed until the driver ...
Sunday, September 22, 2013 at 10:57pm by lanaaaaaa

Physics
A train is traveling down a straight track at 22 m/s when the engineer applies the brakes, resulting in an acceleration of -1.0 m/s2 as long as the train is in motion. How far does the train move during a 40 s time interval starting at the instant the brakes are applied? ...
Saturday, February 6, 2010 at 11:12am by Ana

Accident Investigation: Law+Physics
You're welcome, Cicilia. Inadequate brakes are those that don't work right. I don't think it has anything to do with the driver's reaction time.
Thursday, January 12, 2012 at 10:37pm by Ms. Sue

physics
A car travels along a roadwith a speed of v=25 m/s (about 50 mi/h). The coefficient of kinetic frictionbetween the tires and the pavement is mu k=.55. a). If the driver applies the brakes and the tires "lock up" so that they skid along the road, how far does the car travel ...
Thursday, September 23, 2010 at 12:30pm by Holly

Physics
A 1100 kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m. (a) If the road is completely level, what is the constant force applied to the car to bring it to rest? (...
Thursday, September 16, 2010 at 1:41am by Phil

physics
A car traveling at 91.0 km/h approaches the turnoff for a restaurant 30.0 m ahead. If the driver slams on the brakes with an acceleration of -6.40 m/s^2, what will her stopping distance be?
Sunday, November 20, 2011 at 9:58pm by molly

Physics
A 1100 kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m. (a) If the road is completely level, what is the constant force applied to the car to bring it to rest? (...
Thursday, September 16, 2010 at 9:06am by Phil

physics
Consider a horizontal road with such a set of traffic lights, each spaced†100†m†apart. A car sits at the first traffic light. At†t=0†the light turns green and the car accelerates. What is the maximum time†t†in secondsthe next light must turn green by so the driver of the car ...
Monday, May 27, 2013 at 9:07am by stranger

physics
a car is traveling at 40.0 m/s. the drivers sees an emergeny ahead and 0.50 s later slams on the brakes. the acceleration of the car is -4.0 m/s^2. a. what distance will the car travel before it stops? b. if the driver was able to apply the brakes instantaneously without a ...
Sunday, September 30, 2007 at 4:09pm by jel

physical Science
The Mass Of A Minibus with The Driver is 1500 kg.the Driver Is Moving At A Speed Of 30 m.s When He Notices That The traffic light Ahead Have turned To red.he Applies A Force Of 9000N on the brake pedal. A)calculate his deceleration if the taxi is empty B)how far must he be ...
Sunday, March 10, 2013 at 5:51pm by vuyo

physics
The driver of a car slams on her brakes to avoid colliding with a deer crossing the highway. What happens to the car's kinetic energy as it comes to rest?
Friday, June 4, 2010 at 1:05pm by lau

Physics
1)A car of mass 1330 kg is traveling at 28.0 m/s. The driver applies the brakes to bring the car to rest over a distance of 79.0 m. Calculate the retarding force acting on the car. I don't get it. What is retarding force? gravity has to factor in somewhere due to acceleration...
Tuesday, April 15, 2008 at 10:25pm by Jon

Physics
An automobile is brought to a stop by applying friction brakes to the wheels. The brakes get hot; their thermal energy is increased. The decrease in kinetic of the car is equal to the increase in thermal energy of the brakes. According to the first law of thermodynamics, the ...
Thursday, February 28, 2013 at 7:57pm by Brandi

Physics
Ignore the 95.0 km/h speed of the driver. He may hit the barrier. They want you to calculate the speed V for which the stopping distance would be exactly 39.0 m. The stopping distance will be V*0.95 + (V/{a})*(V/2) = 39.0 m Solve for V. The second term, V^2/(2|a|) is the ...
Tuesday, February 15, 2011 at 6:12pm by drwls

physics
YOu cant assume elasticity in this. THe brakes are on on the truck. What do you think brakes do? ANS: they absorb energy. So the KE total cannot equal incoming energy, before the truck could ever move at all, the brakes are holding it, absorbing energy. Don't let the teacher ...
Wednesday, November 10, 2010 at 7:42pm by bobpursley

physics
A car is traveling at 95km/hr. the driver steps on the brakes and the car comes to a stop in 60m. What is the car's deceleration?
Thursday, September 5, 2013 at 5:26pm by Grace

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 ...
Monday, March 4, 2013 at 9:58pm by Mike

physics
A bus is moving at 30 m/s when the driver steps on the brakes and brings the bus to a stop in 2.6 s. What is the average acceleration of the bus while braking?
Sunday, September 16, 2012 at 11:20pm by shelby

Physics
A bicycle is moving at a constant speed of 12m/s as it covers a distance of 200m. it then applies its brakes and stops over the next 350m. how much time doe sthis total motion take?
Friday, October 7, 2011 at 4:43pm by Madison

physics
A car of mass m traveling at speed v on a horizontal road applies its brakes and comes to rest in time t while traveling a distance of d. The amount of internal energy created is?
Saturday, March 23, 2013 at 5:41pm by wyatt

physics
the car travels at 20m/s when the driver sees a child. It takes 0.8s to react, then steps on the brakes and slows at 7.0m/s^2. How far does the car go before it stops?
Thursday, September 22, 2011 at 12:13am by meghan

dameno
The driver of a 1300-kg car moving at 21 m/s brakes quickly to 13 m/s when he spots a local garage sale. (a) Find the change in the car's kinetic energy.
Monday, April 16, 2012 at 6:38pm by michelle

physics
A train moves at a speed 72km/hr. When it approaches the station the driver brakes the train stops in 30 minutes. a) what is the value of deceleration? b) what is the duration it takes to stop?
Wednesday, March 20, 2013 at 11:55am by Mariam

physics
1)A hiker throws a ball at an angle of 21.0 above the horizontal from a hill 21.0 m high. The hiker's height is 1.750 m. The magnitudes of the horizontal and vertical components are 14.004 m/s and 5.376 m/s, respectivley. Find the distance between the base of the hill and the ...
Wednesday, April 16, 2008 at 1:10pm by Anonymous

Physics
A car is traveling 15 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.0 m/s2. How far does the car go before it stops?
Tuesday, October 2, 2007 at 9:17pm by Lee Kite

physics
A car is traveling 26 m/s when the driver sees a child standing in the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.0 m/s2. How far does the car go before it stops?
Sunday, February 10, 2008 at 4:29pm by will

physics
A car is traveling 20 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.0 m/s2. How far does the car go before it stops?
Monday, September 28, 2009 at 11:14pm by Anonymous

physics
A car is traveling 20 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.0 m/s2. How far does the car go before it stops?
Monday, September 28, 2009 at 11:14pm by Anonymous

Physics
A car is traveling 28 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.0 m/s2. How far does the car go before it stops?
Monday, September 19, 2011 at 8:19pm by Josh

Physics
A car is traveling 17 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.0 m/s2. How far does the car go before it stops?
Wednesday, February 1, 2012 at 6:04pm by Anna

physics
A car is traveling 15 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 8.0 m/s2. How far does the car go before it stops?
Sunday, September 16, 2012 at 11:21pm by shelby

Physics
A car is traveling 28 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.5 m/s2. How far does the car go before it stops?
Wednesday, September 25, 2013 at 6:21pm by Jack

Physics
A car is traveling 28 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.5 m/s2. How far does the car go before it stops?
Wednesday, September 25, 2013 at 6:21pm by Jack

science 10
A student driver is travelling at 22.2 m/s and sees a school zone ahead. Using her brakes, she accelerates at -2.8 m/s2 to reduce her velocity to 8.2 m/s. How much time did it take to change her velocity?
Monday, August 8, 2011 at 2:36am by eric

Physics
A car traveling at 20m/s when the driver sees a child standing in the road. He takes 0.80s to react, then steps on the brakes and slows at 7.0m/s^2. How far does the car go before it stops?
Wednesday, January 22, 2014 at 8:30pm by Sandara

Physics
A car with a mass of 890 kg travels at a speed of 20.0 m/s. Seeing that the road ahead is blocked by a rock slide, the driver applies the brakes, stopping the car. The work of stopping the car becomes thermal energy of the carís four disk brake rotors; in other words, all of ...
Monday, April 18, 2011 at 12:05am by Kaylynn

physics
A car with a mass of 890 kg travels at a speed of 20.0 m/s. Seeing that the road ahead is blocked by a rock slide, the driver applies the brakes, stopping the car. The work of stopping the car becomes thermal energy of the carís four disk brake rotors; in other words, all of ...
Monday, April 18, 2011 at 9:27am by Kaylynn

physics
A car with a mass of 890 kg travels at a speed of 20.0 m/s. Seeing that the road ahead is blocked by a rock slide, the driver applies the brakes, stopping the car. The work of stopping the car becomes thermal energy of the carís four disk brake rotors; in other words, all of ...
Thursday, April 28, 2011 at 5:10pm by Anonymous

math
Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a propertional to the square of his remaining speed. One mile later, driver A's speed was exactly halved.If driver B's ...
Tuesday, February 26, 2013 at 4:09am by angah

physics
A truck is traveling at 19 m/s to the north. The driver of a car, 460 m to the north and traveling south at 26 m/s, puts on the brakes and slows at 3.5 m/s2. Where do they meet?
Wednesday, September 14, 2011 at 10:22pm by ricky

physics
a car is traveling 20.0 m/s when the driver sees a child standing in the road. he takes 0.80 seconds to react, then steps on the brakes and slows at -7.0 m/s squared. how far does the car go before it stops?
Monday, February 27, 2012 at 12:21am by allison

physics
A passenger sitting in the rear of the bus claims that he was injured when the driver slammed on the brakes, causing a suitcase in front of the bus to come flying towards him. If you were the judge in this case, what disposition would you make and why?
Friday, September 21, 2012 at 11:13pm by krizha

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