Friday

April 18, 2014

April 18, 2014

Number of results: 59,962

**Algebra I**

"A car is traveling at r speed. A plane is traveling at 5r speed. When will they both reach 200 miles?"
*Monday, May 23, 2011 at 11:07pm by Beth*

**Algebra I**

1. A Passenger train's speed is 60mi/h and a freight train's speed is 40mi/h. The passenger train travels the same distance in 1.5 h less time than the freight train. How long does each train take to make the trip? 2. Lois rode her bike to visit a friend. She traveled at 10 mi...
*Tuesday, October 9, 2007 at 8:19pm by Wilford*

**Physics URGENT!!!**

A commuter train passes a passenger platform at a constant speed of 31 m/s. The train horn is sounded at its characteristic frequency of 330 Hz.Assume the speed of sound is 343 m/s. (a) What is the frequency detected by a person on the platform as the train approaches? (b) ...
*Sunday, December 2, 2012 at 4:02pm by Anonymous*

**PHYSICS**

A TRAIN LEAVES THE STATION AT THE 0.0 M MARKER TRAVELING WITH A CONSTANT VELOCITY OF 36.0 M/S. A) WHAT IS THE VELOCITY OF THE TRAIN IN KM/HR.
*Monday, August 13, 2012 at 1:29am by Anonymous*

**Physics**

When a high-speed passenger train traveling at 124 km/h rounds a bend, the engineer is shocked to see that a locomotive has improperly entered onto the track from a siding and is a distance D=666 m ahead. The locomotive is moving at 21 km/. The engineer of the high-speed train...
*Tuesday, June 14, 2011 at 8:30pm by Chelsea*

**MATH Algebra**

The speed of a passenger train is 6 mph faster than the speed of a freight train. The passenger train travels 280 miles in the same time it takes the freight train to travel 250 miles. Find the speed of each train. What is the speed of passenger train? ____mph What is the ...
*Friday, August 7, 2009 at 10:16pm by Anonymous*

**Algebra-help**

12. A train traveled at a constant speed for 6 hours. The train traveled 225 miles in those 6 hours. What was the speed, in miles per hour, of the train? answer: 37.5 Is that correct? Thank You
*Friday, February 1, 2013 at 6:27pm by Brendon*

**algebra 1b**

the speed of a passenger train is 18mph faster than the speed of a freight train. The passenger train travels 310 miles in the same time it takes the freight train to travel 220 miles. Find the speed of each train passenger train mph and freight train mph
*Wednesday, March 21, 2012 at 4:43pm by kay*

**physics**

Suppose the coefficient of static friction between the road and the tires on a Formula One car is 0.7 during a Grand Prix auto race. What speed will put the car on the verge of sliding as it rounds a level curve of 39.0 m radius?
*Saturday, November 17, 2012 at 12:36am by fadsfads*

**math**

train A and train B traveling same direction. train A passes station 9:20, train B passes station 9:32, when will train B catch train A
*Thursday, May 3, 2012 at 11:24pm by Randy*

**PHysics**

A dragster maintains a speedometer reading of 100 km/h and passes through a curve with a constant radius. Which statement is true? 1. The dragster rounded the curve at a changing velocity of 100 km/h. 2. The dragster moved along a straight line at a constant velocity of 100 km...
*Thursday, April 28, 2011 at 1:24am by Maria*

**Physics**

A dragster maintains a speedometer reading of 100 km/h and passes through a curve with a constant radius. Which statement is true? 1. The dragster rounded the curve at a changing velocity of 100 km/h. 2. The dragster moved along a straight line at a constant velocity of 100 km...
*Thursday, April 28, 2011 at 1:40am by Leslie*

**algebra**

a passenger train traveling at 50 mph leaves the station 6 hours after a freight train and ovetakes it in 4 hours . How fast is the freight train traveling ?
*Friday, June 29, 2012 at 6:44pm by naaman*

**algebra**

train A and B are traveling in the same direction on parallel tracks. train A is going 80 miles per hour train B is going 84 miles per hour. train A past a station at 2:15 am train B passes at 2:45 am what time will train B catch train A
*Thursday, October 21, 2010 at 11:18pm by brian*

**math**

IF the speed of train A is 10 mph slower than train B. Train A travels 220 miles in the same time it takes train B to travel 270. What is the speed of both trains.
*Saturday, April 27, 2013 at 10:09am by nannypam*

**PHYSICS**

A subway train is traveling at 80km/h when it approaches a slower train 49m ahead traveling in the same direction at 24km/h
*Monday, October 9, 2006 at 8:32pm by jamary*

**Math**

The The speed of a passenger train is 12 mph faster then the speed of a freight train. The passenger train travels 270 miles in the same time it takes the freight train to travel 210 miles. Find the speed of each train.
*Thursday, February 14, 2008 at 8:13pm by Debbie*

**Algebra**

The speed of a passenger train is 20 mph faster than the speed of a freight train. The passenger train travels 250 miles in the same time it takes the freight train to travel 150 miles. find the speed of each train.
*Friday, June 3, 2011 at 11:35pm by Francessca*

**algebra**

The speed of a passenger train is 16 mph faster than the speed of a freight train. The passenger train travles 300 miles in the same time it takes the freight train to travel 220 miles. find the speed of each train
*Friday, June 22, 2012 at 7:33am by todd*

**physics**

Cora is a passenger in a car traveling east along a country highway that is parallel to a railroad track and clear of any traffic. Her friend Liz is driving. They come up behind the last car of a train on the track. Initially, the train is moving a little slower than they are...
*Monday, January 30, 2012 at 3:30pm by Kathy*

**Algebra**

Train a is traveling @ 60 miles per hour. Train b is traveling @ 80 miles per hour. A arrives @ 9:25 am and b arrives @ 9:40 am what ime will train b catch up to train a?
*Sunday, June 12, 2011 at 5:08pm by David*

**math**

the speed of train A is 14 miles slower than train B. train A travels 210 miles in the same time it takes train B to travel 280 miles. Whats the speed of each train?
*Thursday, April 11, 2013 at 9:31pm by pam*

**algebra**

please tell me if these are right. Soybean meal is 12% protein, cornmeal is 6% protein. How many pounds of each should be mixed together in order to get 240-lb. mixture that is 11% protein? 80 pounds soybean and 160 pounds of cornmeal Trains A and B are traveling in the sme ...
*Friday, August 5, 2011 at 7:24pm by babs*

**physics**

A train moving with constant velocity travels 190 m north in 12 and an undetermined distance to the west. The speed of the train is 36 m/s. Find the direction of the train's motion relative to north.
*Friday, September 16, 2011 at 12:05am by anonymous*

**physics**

Find the speed at which Superman (mass=89.0 kg) must fly into a train (mass = 19564 kg) traveling at 65.0 km/hr to stop it. The system (train + Superman) must end up with zero momentum. With no external forces, Superman's initial momentum must be equal and oppositely directed ...
*Wednesday, February 20, 2008 at 5:57pm by katie*

**Physics**

As a train accelerates from a station, it reaches a speed of 4.7m/s in 5.0s. If a train acceleration remains constant what is its speed after an additional 6.0s has elapsed?
*Friday, January 21, 2011 at 1:18pm by Lesh*

**Physics**

Hi everyone, finished all my utexas physics homework, save this last question... I don't quite why I'm not getting the right answer. Any help offered will be appreciated, it could lead me to the right answer :) P.S.---- I've already imputed the following four answers which ...
*Sunday, October 24, 2010 at 9:23pm by Kyle*

**Physics**

Hi everyone, finished all my utexas physics homework, save this last question... I don't quite why I'm not getting the right answer. Any help offered will be appreciated, it could lead me to the right answer :) P.S.---- I've already imputed the following four answers which ...
*Sunday, October 24, 2010 at 9:23pm by Kyle*

**physics**

A cyclist enters a curve of 30 m radius at a speed of 12 m s-1. He applies the brakes and decreases his speed at a constant rate of 0.5 m s-2. Calculate the cyclist’s centripetal (radial) [3 marks] and tangential [15 marks] accelerations when he is travelling at a speed of 10 ...
*Tuesday, February 28, 2012 at 10:27am by alex*

**physical**

The radius of the track is 50 meter.He starts at point A and maintain a constant speed.He finishes three completed round in 9 minutes.What was his displacement after three rounds.
*Tuesday, January 18, 2011 at 11:47am by Ayanda*

**physics**

A juggler traveling in a train on level track throws a ball straight up, relative to the train, with a speed of 5.75 m/s. The train has a velocity of 19 m/s due east. (a) As observed by the juggler, what is the ball's total time of flight? s What is the displacement of the ...
*Thursday, May 30, 2013 at 1:39pm by James*

**math**

Train leaves a stationa traveling at 60 miles per hour. Eight hours later train B leaves the same station traveling in the same direction at 80 miles per hour. How long does it atke for train B to catch up to train A.?
*Thursday, October 14, 2010 at 1:04pm by Matt*

**algebra**

a passenger train's speed is 60mi/h, and a freight train's speed is 40mi/h .The passenger train travels the same distance in 1.5 h less time than the freight train. how long does each train take to make the trip?
*Thursday, October 21, 2010 at 8:42pm by Anonymous*

**physics**

need help on this three part one its about inelastic collisions momentum and energy related with work Find the speed at which Superman (mass=76.0 kg) must fly into a train (mass = 17620 kg) traveling at 60.0 km/hr to stop it. Running into the train at that speed would severely...
*Tuesday, February 26, 2008 at 4:24pm by kdhgwiu*

**algebra**

1. The speed of a passenger trin is 18mph faster than the speed of a freight train. The passenger train travels 260 miles in the same time it takes the feight train to travel 170 miles. Find the speed of each train.
*Thursday, November 17, 2011 at 12:55pm by lisa*

**Physics**

The train may be moving at a constant speed in a circle. The train must be accelerating.
*Friday, September 21, 2012 at 2:07am by drwls*

**physics-2**

A tracks extends a distance of 478 km without a curve. Supposed a train with an initial speed of 72 km/h travels along the entire length of straight track with a uniform acceleration. the train reaches the end of the track in 5 h, 39 min. What is the trains final speed?
*Wednesday, September 16, 2009 at 10:24pm by NoNo100*

**physics**

a 10,000hg car rounds a curve of radius 1200ft at 50mph what is its centripetal acceleration?
*Saturday, July 7, 2012 at 11:58am by John*

**English**

1. When he was trveling by train, he met the girl. 2. Being traveling by train, he met the girl. 3. Traveling by train, he met the gril. (Are the three sentences correct and the same?)
*Thursday, May 21, 2009 at 11:41am by John*

**Dynamics**

During a high-speed chase, a 2400-lb sports car traveling at a speed of 100 mi/h just loses contact with the road as it reaches the crest A of a hill. a) Determine the radius of curvature r of the vertical profile of the road at A. b) Using the value of r found in a part a), ...
*Thursday, March 24, 2011 at 11:22am by Sarah*

**physics**

Posted by sandhu on Wednesday, November 24, 2010 at 4:29am. The firetruck goes around a 180°, 162 m radius circular curve. It enters the curve with a speed of 12.6 m/s and leaves the curve with a speed of 38.8 m/s. Assuming the speed changes at a constant rate, what is the ...
*Wednesday, November 24, 2010 at 8:37pm by sandhu*

**Physics**

A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 336 m/s. a)An observer waiting at the crossing receives a frequency of 205 Hz. What is the speed of the train?
*Tuesday, September 3, 2013 at 5:59pm by Ben*

**Physics**

A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 336 m/s. a)An observer waiting at the crossing receives a frequency of 205 Hz. What is the speed of the train?
*Tuesday, September 3, 2013 at 6:14pm by Ben*

**algebra**

Train A leaves a station traveling at 80km/h. Two hours later, train B leaves the same direction at 90km/h. How long does it take train B to catch up to train A?
*Sunday, November 3, 2013 at 7:03pm by Kirsten*

**Algebra**

A freight train leaves Chicago traveling West at 35 mph. An hour later a passenger train leaves Chicago traveling on a parallel track at 60 mph. How far from Chicago will the passenger train catch up to the freight train?
*Sunday, April 28, 2013 at 12:14pm by Sarah*

**Physics**

The velocity of a train reduced uniformly from 15 m/s to 7 m/s while traveling a distance of 90 m. a)compute the acceleration b) How much farther will the train travel before coming to rest, provided the acceleration remains constant?
*Monday, September 17, 2012 at 9:47pm by Anonymous*

**calculus**

An automobile travels at a constant speed around a curve whose radius of curvature is 2000m. What is the maximum allowable speed if the maximum acceptable value for the normal scalar component of acceleration is 1.5m/s squared?
*Wednesday, April 24, 2013 at 11:38am by aimi najwa*

**Physics**

If a curve with a radius of 85 is perfectly banked for a car traveling 71 , what must be the coefficient of static friction for a car not to skid when traveling at 86 ?
*Saturday, February 19, 2011 at 6:16pm by B-rad*

**physic**

If a curve with a radius of 80m is properly banked for a car traveling 63km/h , what must be the coefficient of static friction for a car not to skid when traveling at 97km/h ?
*Saturday, July 6, 2013 at 3:21pm by fermona*

**physics help pleased**

Two trains on separate tracks move toward one another. Train 1 has a speed of 125 km/h and train 2 a speed of 100.0 km/h. Train 2 blows its horn, emitting a frequency of 500 Hz. What is the frequency heard by the engineer on train 1? (Assume the speed of sound is 345 m/s.)
*Friday, January 28, 2011 at 1:43pm by julie*

**pre algebra**

train A leaves a station at 1:15 PM,traveling 60 mph.Train B leaves the same station, in the same direction as train A,15 minutes later.If train B travels 90mphm when (clock time)will train B catch up to train A and how far down the track does this occur?
*Monday, November 8, 2010 at 5:31pm by mary*

**Physics 1**

What is the minimum speed a 3,200 pound car can have on a flat road when going around a curve with a radius of 300ft. Take the static coefficient of friction to be 0.8.
*Sunday, February 20, 2011 at 12:34pm by Lindsey*

**Math**

5) A freight train leaves a station traveling at 32 km/h. Two hours later, a passenger train leaves the same station traveling in the same direction at 52 km/h. How long does it takes the passenger train to catch up to the freight train? Its a basic question but i never ...
*Thursday, September 11, 2008 at 7:35pm by Pat Stout*

**Physics**

A freight train traveling with a velocity of -4.0 m/s begins backing into a train yard. If the train's average acceleration is -0.27 m/s/s, what is the train's velocity after 17 seconds? Can someone tell me which formula to use for this?
*Thursday, September 13, 2007 at 8:53pm by Lindsay*

**Physics**

If a curve with a radius of 88m is perfectly banked for a car traveling 75km/h, what must be the coefficient of static friction for a car not to skid when traveling at 95km/h?
*Wednesday, February 23, 2011 at 9:46am by Emily Grossman*

**Physics**

A certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 29.0 m/s. With what maximum speed can it go around a curve having a radius of 88.0 m?
*Tuesday, November 13, 2012 at 5:20pm by Greg*

**physics**

A certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 34.0 m/s. With what maximum speed can it go around a curve having a radius of 60.0 m?
*Wednesday, November 14, 2012 at 10:49pm by heather*

**physics**

I need help with this question. A commuter train blows its horn as it passes a passenger platform at a constant speed of 55.0 m/s. The train horn sounds at a frequency of 350 Hz when the train is at rest. (a) What is the frequency observed by a person on the platform as the ...
*Monday, April 21, 2008 at 7:58pm by Chris Adison*

**physics**

How long does it take a plane, traveling at a constant speed of 160 m/s, to fly once around a circle whose radius is 3450 m?
*Monday, January 24, 2011 at 8:05pm by lucey*

**physics**

How long does it take a plane, traveling at a constant speed of 166 m/s, to fly once around a circle whose radius is 4000 m?
*Sunday, June 30, 2013 at 10:47pm by Justin S.*

**algebra**

A passenger train's speed is 60 mi/h, and a freight train's speed is 40 mi/h. The passenger train travels the same distance in 1.5 h less time than the freight train. How long does each train take to make the trip?
*Sunday, September 13, 2009 at 12:22pm by Mary*

**Physics**

If a curve with a radius of 88m is perfectly banked for a car traveling 75km/h, what must be the coefficient of static friction for a car not skid when traveling at 95 km/h?
*Tuesday, February 22, 2011 at 2:03pm by Emily Grossman*

**Math Word Problem**

A metra commuter train leaves Union Station in Chicago at 12 noon. Twp hours later an Amtrak train leaves on the same track, traveling at an average speed that is 50 miles per hour faster than the Metra train. At 3PM the Amtrak train is 10 miles behind the commuter train. How ...
*Thursday, September 16, 2010 at 12:42am by amy*

**science **

A 1520 kg car rounds a 164m radius curved at a constant speed of 22.0 m/s. What is the centripetal acceleration of the car? What is the centripetal force acting on the car?
*Sunday, November 24, 2013 at 5:29am by Tel *

**Physics**

A ball traveling in a circle with a constant speed of 8 m/s has a centripetal acceleration of 5 m.s^. What is the radius of the circle?
*Friday, February 11, 2011 at 11:56pm by Tammy*

**PHYSICS**

A circular curve of highway with radius 200m is designed for traffic moving at 100km/h, and is banked so that cars can make the curve even without friction at that speed. What is the correct angle of banking for this curve? Show steps, please.
*Monday, April 19, 2010 at 4:17pm by Joey*

**physics**

A commuter train passes a passenger platform at a constant speed of 40.0 m/s. The train horn is sounded at its characteristic frequency of 320 Hz. What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding?
*Friday, January 28, 2011 at 1:18pm by julie*

**physics**

The last car unfastens from a moving train. The train continues to move at the same constant speed. What is the ratio of the paths covered by the train and car up to the moment of the car’s stop? Assume that the car decelerates uniformly. Solve this problem graphically.
*Wednesday, August 17, 2011 at 10:20pm by Anonymous*

**CALCULUS-GUYS..PLEASE HELP...THIS DUE TOMORROW..**

An automobile travels at a constant speed around a curve whose radius of curvature is 2000m. What is the maximum allowable speed if the maximum acceptable value for the normal scalar component of acceleration is 1.5m/s^2?
*Wednesday, April 24, 2013 at 11:49am by aimi najwa*

**physics**

A 2100 kg car rounds a curve of 67 m banked at an angle of 13. If the car is traveling at 105 km/h, will a friction force be required? If so, in what direction?
*Friday, October 29, 2010 at 1:11am by Emma*

**physics**

A commuter train passes a passenger platform at a constant speed of 40.8 m/s. The train horn is sounded at its characteristic frequency of 320 Hz.
*Friday, January 28, 2011 at 1:18pm by Anonymous*

**algebra**

The speed of a passenger train is 18mph faster than the speed of a freight train. The passenger train travels 260 miles in the same it takes the same time it takes the freight train to travel 170 miles. Find the speed of each train.
*Friday, June 1, 2012 at 6:24pm by plz hlp*

**Algebra**

Two trans leave Chicago going opposite directions, one going north and the other going south. The northbound train is traveling 12 mph slower than the southbound train. After 4 hours the trains are 528 miles apart. Find the speed of each train. I would appreciated so much if ...
*Wednesday, January 26, 2011 at 3:44pm by Megan Brown*

**Algebra**

Is there an easier way to do this? "A freight train leaves a station at 4:00 p.m. traveling at 30 kilometers per hour. A passenger train leaves 1 hour later, traveling at 50 kilometers per hour. At what time will the passenger train overtake the freight train?
*Monday, January 3, 2011 at 9:14pm by Rachel*

**Math**

you are 70 meters from train and road crossing with the train going 60meters per second, after 4 seconds has fast is the train traveling away from you?
*Saturday, January 8, 2011 at 9:43pm by Tom*

**math**

Train A is 12 mph slower than train B. Train A travels 230 miles in the same time it takes train B to travel 290 miles. Find the speed of each train.
*Thursday, May 20, 2010 at 11:33am by Marie*

**math**

Train A is 12 mph slower than train B. Train A travels 230 miles in the same time it takes train B to travel 290 miles. Find the speed of each train.
*Thursday, May 20, 2010 at 1:06pm by Help Me Pleeease*

**Physics**

How to solve/ work this problem? If a curve with a radius of 88m is perfectly banked for a car traveling 75 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 95km/h?
*Monday, February 21, 2011 at 10:36pm by Emily Grossman*

**physics**

If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the curve (a real problem on icy mountain roads). (a) Calculate the ideal speed to take a 105-m radius curve banked at 13.0°. km/h (b) What is the ...
*Friday, November 30, 2012 at 7:02pm by HELP!!!*

**Physics**

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 8.2 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 62° when they move past the window. How fast is ...
*Monday, September 3, 2007 at 5:33pm by Student*

**Physics**

A track is mounted on a large wheel that is free to turn with negligible friction about a vertical axis. A toy train of mass m = 0.140 is placed on the track and, with the system initially at rest, the train's electrical power is turned on. The train reaches a steady speed of ...
*Thursday, January 16, 2014 at 6:48pm by Josh*

**Physics**

The cake company truck is on it's way deliver a cake for a party when it rounds a curve of radius 20 m at a speed of 12 m/s. What coefficient of friction is needed between the cake pan and the truck in order to keep the pan from slipping? please show work!
*Wednesday, February 9, 2011 at 11:44pm by coefficient of fric?*

**math**

A computer train travels the distance from Acton to Boston in 1 hour and 10 minutes. If the train is traveling at an average speed of 48 miles per hour, what is the distance between the two cities?
*Tuesday, July 16, 2013 at 7:54pm by andrew*

**math**

A commuter train travels the distance from Acton to Boston in 1 hour and 10 minutes. If the train is traveling at an average speed of 48 miles per hour, what is the distance between the two cities?
*Wednesday, July 17, 2013 at 1:03am by vincent*

**Physics**

A car traveling at constant speed safely negotiates a frictionless banked curved. Calculate the speed of the car when the road is banked at 20 degrees and the radius of its path is 50 meters. (HINT - Do not rotate your axes) Answer v=13.35 m/s
*Wednesday, November 21, 2012 at 8:46pm by Anonymous*

**Physics**

A car traveling at constant speed safely negotiates a frictionless banked curved. Calculate the speed of the car when the road is banked at 20 degrees and the radius of its path is 50 meters. HINT – Do not rotate your axes. Answer v = 13.35 m/s
*Sunday, November 25, 2012 at 9:25pm by Anonymous*

**physic**

On an otherwise straight stretch of road near Moffat, Colorado, the road suddenly turns. This bend in the road is a segment of a circle with radius 118 m. Drivers are cautioned to slow down to 45mph as they navigate the curve. you heed the sign and slow to 45mph , what will be...
*Saturday, September 22, 2012 at 4:57pm by Amy*

**Physics help.**

If a curve with a radius of 94.5 m is perfectly banked for a car traveling 72.4 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 96.4 km/h?
*Monday, March 5, 2012 at 6:55pm by Annie*

**Physics**

A curve of radius 40 m is banked so that a 1070 kg car traveling at 60 km/h can round it even if the road is so icy that the coeﬃcient of static friction is approximately zero. The acceleration of gravity is 9.81 m/s a)Find the minimum speed at which a car can travel ...
*Wednesday, March 2, 2011 at 11:22am by Johnnie*

**Physics**

A train travels east at a speed of 50 m/s. A passenger is walking towards the rear of the train at a speed of 3 m/s. Assume that you are standing at the train station and observing the motion of the passenger as the train passes you at the station. What is the velocity of the ...
*Monday, January 7, 2013 at 10:53pm by Shaundrea*

**MATHS**

A TRAIN B SPEEDING WITH 120KMPH CROSSES ANOTHER TRAIN C, RUNNING IN THE SAME DIRECTION IN 2 MINUTES. IF THE LENGTH OF THE TRAIN B AND C BE 100M AND 200M RESPECTIVELY. WHAT IS THE SPEED OF THE TRAIN C
*Wednesday, June 23, 2010 at 5:58am by PRIYA*

**physics **

A freight train has a mass of 1.4 107 kg. If the locomotive can exert a constant pull of 8.1 105 N, how long does it take to increase the speed of the train from rest to 66 km/h?
*Friday, October 7, 2011 at 12:44am by savy*

**Physics**

A freight train has a mass of 1.7 107 kg. If the locomotive can exert a constant pull of 7.6 105 N, how long does it take to increase the speed of the train from rest to 64 km/h?
*Wednesday, February 1, 2012 at 10:14pm by Tiffany*

**Physics**

A freight train has a mass of 1.2 107 kg. If the locomotive can exert a constant pull of 8.4 105 N, how long does it take to increase the speed of the train from rest to 88 km/h?
*Monday, February 11, 2013 at 7:55pm by Kayka*

**math**

Supppose two trains leave Holbrook, Arizona, at the same time, traveling in opposite directions. One train travels 10 mph faster than the other. In 3.5 hours, the trains are 322 miles apart. Find the speed of each train.
*Tuesday, December 4, 2012 at 2:46am by justin*

**Physics**

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 3.6 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 60° when they move past the window, as the drawing...
*Sunday, February 16, 2014 at 7:06pm by Steph*

**trig**

A barge is pulled by two tugboats. The first tugboat is traveling at a speed of 12 knots with heading 140°, and the second tugboat is traveling at a speed of 17 knots with heading 200°. Find the resulting speed and direction of the barge. (Round your answers to the nearest ...
*Sunday, July 21, 2013 at 10:58pm by Priscilla*

**physics**

A curve of radius 20 m is banked so that a 970 kg car traveling at 50 km/h can round it even if the road is so icy that the coeﬃcient of static friction is approximately zero. The acceleration of gravity is 9.81 m/s^2 Find the minimum speed at which a car can travel ...
*Thursday, November 1, 2012 at 12:22am by JoAnna*

**math**

A passenger train travelled at an average speed of 72 km/h. A man on the passenger train observed a goods train, which was travelling at a speed of 54 km/h, in the on-coming direction. If the goods train passed him in 10 seconds, find the length of the goods train. Is it ...
*Monday, September 3, 2012 at 10:44pm by Im*

**Math**

A train going 60 mph left several minutes before the 63mph train. Traveling on parallel tracks the faster train reaches the slower one in 3 hours. How many minutes head start did the slower train have?
*Monday, May 23, 2011 at 12:03am by Hannah Montana*

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