Thursday

April 17, 2014

April 17, 2014

Number of results: 47,925

**physics**

A car accelerates from rest at 7.9 m/s2. How much time does it need to attain a speed of 5 m/s? Answer in units of s.
*Wednesday, September 29, 2010 at 4:15pm by steve*

**physics**

a car starts from rest and accelerates uniformly at 2m/s for 10second. what is its velocity at the end of 10 second?
*Wednesday, June 20, 2012 at 9:21am by Anonymous*

**Physics**

I'm given two cars A and B Car A is 1100 kg and traveling at 11 m/s Car B is 1400 kg and traveling at 15 m/s and I'm asked to fidn the velocity of both is just the net velocity 4 m/s ??? I'm also to find the impulse and how would I do that??? impulse is chang in momentum over ...
*Wednesday, June 17, 2009 at 2:23am by Physics*

**college physics**

A 1300 kg car rolling on a horizontal surface has speed v = 65 km/h when it strikes a horizontal coiled spring and is brought to rest in a distance of 2.9 m. What is the spring stiffness constant of the spring?
*Sunday, February 28, 2010 at 10:03am by Anonymous*

**Physics**

How much work must be done on a 500-kg car to accelerate it from 29-km/hr to 112-km/hr?
*Wednesday, March 6, 2013 at 7:12pm by Rita*

**physics**

When you take your 1200 kg car out for a spin, you go around a corner of radius 54.5 m with a speed of 16.2 m/s. The coefficient of static friction between the car and the road is 0.95. Assuming your car doesn't skid, what is the force exerted on it by static friction?
*Friday, October 12, 2012 at 5:29pm by Anonymous*

**Help! Calculus**

An elevator in a high rise building accelerates and decelerates at the rate of 1 foot per second squared. Its maximum speed is 8 feet per second. It starts from rest, accelerates to its maximum speed and stays at that maximum speed until it approaches its destination where it ...
*Wednesday, November 6, 2013 at 9:46pm by Kimmie*

**calculus HELP!**

An elevator in a high rise building accelerates and decelerates at the rate of 1 foot per second squared. Its maximum speed is 8 feet per second. It starts from rest, accelerates to its maximum speed and stays at that maximum speed until it approaches its destination where it ...
*Wednesday, November 6, 2013 at 9:53pm by Kimmie*

**science**

An elevator in a high rise building accelerates and decelerates at the rate of 1 foot per second squared. Its maximum speed is 8 feet per second. It starts from rest, accelerates to its maximum speed and stays at that maximum speed until it approaches its destination where it ...
*Wednesday, November 6, 2013 at 10:19pm by Jenna*

**physics**

A 7000 kg helicopter accelerates upward at 0.70 m/s/s while lifting a 1000 kg car to a mountaintop for a TV commercial photo shoot. -What tension must the cable be able to withstand without breaking?
*Monday, October 18, 2010 at 3:13pm by Diana*

**physics**

a 1200 kg car going 30 m/s applies its brakes and skids to rest. if the friction force between the sliding ires and the pavement is 6000 N, how far does the car skid before coming to rest. I know the ans is 90 m what work/energy formula should i use to get this answer? can you...
*Thursday, February 11, 2010 at 7:27pm by edwin*

**Physics**

constant velocity components Vx = 4500/1400 Vy = 0 Vz = -3000/1400 goes for 18-9 or 9 seconds distance = speed*time so x = 94 + 9*4500/1400 y = 0 + 0 z = 30 -9(3000/1400)
*Thursday, January 23, 2014 at 6:42pm by Damon*

**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 car sits in an entrance ramp to a freeway, waiting for a break in the traffic. The driver sees a small gap between a van and an 18-wheel truck and accelerates with constant acceleration along the ramp and onto the freeway. The car starts from rest, moves in a straight line, ...
*Sunday, September 29, 2013 at 8:51pm by Emma*

**Physics**

In the figure here, a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 223 m. If the red car has a constant velocity of 22.0 km/h, the cars pass each other at x = 44...
*Friday, September 17, 2010 at 12:25am by Anonymous*

**physics**

In the figure here, a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 223 m. If the red car has a constant velocity of 22.0 km/h, the cars pass each other at x = 44...
*Tuesday, August 30, 2011 at 11:37pm by Anonymous*

**statistics**

I'm having trouble with estimating probability: In a study of 685 cars in a parking lot, there were only 3 different types: sedan, sports car and mini-van. 211 of the cars were mini-vans. Use this information to estimate the probability of choosing a car that is a sedan or ...
*Friday, June 20, 2008 at 8:16pm by tmac357A*

**Physics-motion**

A car accelerates uniformly from rest at a. After a certain time, its acceleration becomes -a. It continues to travel and stops finally. If the total displacement of the car is L, what is the total time of travel? The answer is (4L/a)^(1/2). But why??
*Saturday, March 8, 2014 at 5:28am by Anonymous*

**Engineering science**

A vehicle with a mass of 1200 kg accelerates uniformly from rest upwards with an incline of 1:25 and reaches a speed of 72 km/h after 2 minutes,calculate: 1.The kineyic energy of the vehicle after 2 minutes 2.The potential energy of the vehicle after 2 minutes
*Sunday, May 26, 2013 at 10:16am by Ayanda*

**physics**

how long will it take a car to cover a distance of 500 meters if it accelerates from rest at a rate of 5.50 m/s2?
*Wednesday, January 11, 2012 at 8:38pm by Aries*

**physics**

A car traveling at 70 km/h. It then accelerates at 3.6m/s^2 to 90km/h. How long does it take to reach a new speed. How far does it travel during acceleration
*Friday, January 13, 2012 at 10:51pm by Tasha*

**Physics**

A policeman travelling 60 km/h spots a speeder ahead , so he accelerates his vehicle at a steady rate of 2.22 m/s^2 for 4.00 s, at which time he catches up with the speeder. a) How fast was the policeman travelling in m/s? b) How fast is the police car travelling after 4.00 s...
*Sunday, September 16, 2012 at 4:49pm by Hanu*

**Physics**

A policeman travelling 60 km/h spots a speeder ahead , so he accelerates his vehicle at a steady rate of 2.22 m/s^2 for 4.00 s, at which time he catches up with the speeder. a) How fast was the policeman travelling in m/s? b) How fast is the police car travelling after 4.00 s...
*Sunday, September 16, 2012 at 8:52pm by Hanu*

**Physics**

A policeman travelling 60 km/h spots a speeder ahead , so he accelerates his vehicle at a steady rate of 2.22 m/s^2 for 4.00 s, at which time he catches up with the speeder. a) How fast was the policeman travelling in m/s? b) How fast is the police car travelling after 4.00 s...
*Monday, September 17, 2012 at 9:32am by Hanu*

**Physics**

A policeman travelling 60 km/h spots a speeder ahead , so he accelerates his vehicle at a steady rate of 2.22 m/s^2 for 4.00 s, at which time he catches up with the speeder. a) How fast was the policeman travelling in m/s? b) How fast is the police car travelling after 4.00 s...
*Monday, September 17, 2012 at 12:22pm by Hanu*

**physics**

36 km/h = 36000m/3600 s = 10 m/s Car's initial momentum = 10^3*10 = 10^4 kg*m/s Divide that by the stopping time (5 s) to get the average force, in newtons. The "work done by the car" is the initial kinetic energy of the car, (1/2)MVo^2 = 5*10^4 J, but it is mostly converted ...
*Monday, December 31, 2012 at 6:34am by drwls*

**Physics**

A car traveling on a flat (unbanked) circular track accelerates uniformly from rest with a tangential acceleration of 1.70 m/s2.The car makes it one quarter of the way around the circle before it skids off the track. Determine the coefficient of static friction between the car...
*Monday, February 22, 2010 at 9:52pm by engmath*

**Physics**

A car of mass m = 1450 kg is traveling at a speed of v0 = 79 km/h (21.9 m/s). Calculate the work that must be done by the brakes to completely stop the car in kJ
*Sunday, May 27, 2012 at 6:43pm by Nate*

**Physics**

A 1000 kg car traveling at 72 km/h strikes a concrete wall and comes to a full stop in 2 sec. What is the average force of impact exerted on the car?
*Wednesday, November 14, 2012 at 8:33pm by Yanely*

**Physics**

A 1000 kg car rounds a curve of radius 70 m banked at an angle of 12°. What is the magnitude of the friction force required for the car to travel at 82 km/h?
*Monday, September 30, 2013 at 10:44pm by Charlie*

**algebra**

d = 125t + 175t = 1400, 300t = 1400, t = 1400 / 300 = 4.67 hrs.
*Saturday, October 9, 2010 at 4:00pm by Henry*

**physics**

A car starting from rest accelerates uniformly are attaing a speed of 80m/s in 30s it maintains this stedy speed for another 30s. It then slow down uniformly until it comes to rest in the next 40s
*Friday, February 24, 2012 at 12:06am by adeyemi*

**Sports**

Researching events that occured in the world of sports on August 22, 1988 locally, statewide, nationwide, worldwide, in high school sports, college sports, professional sports, and olympics.
*Tuesday, January 15, 2008 at 4:54pm by LaTarial Williams*

**Physics**

While blowing its horn of f=524 Hz a car accelerates at 0.8m/s^2 the car starts from rest by your side and moves away. Find the time it taked for the frequency you hear to decrease by 5%. Hint: Dont forget to include the time it takes for sound to reach you any help would be ...
*Monday, February 22, 2010 at 5:53pm by Nate*

**Physics for life science**

1. A car starts from rest and accelerates at a constant rate to 80km/h in 6s in positive direction. What is the acceleration? 2. After how long will the car speed be 120km/h if it keep accelerating at the same rate as in 1.? 3.After the car reached speed of 120km/h it travels ...
*Tuesday, March 23, 2010 at 5:18am by Simeon*

**Physics**

What is the kinetic energy of a 1100 kg sports car traveling down the road with a speed of 22 m/s?
*Friday, November 8, 2013 at 3:19pm by Tammy *

**Calculus**

a police helicopter is flying at 200 km/hr at a constant altitude of 1 km above a straight road. The pilot uses radar to determine that an oncoming car is at a distance of exactly 2 km from the helicopter, and that this distance is decreasing at 250 km/hr. Find the speed of ...
*Monday, November 8, 2010 at 1:34pm by Alex*

**physics**

Let a force of 1500 Newtons act through a distance of 200 meters on a 1500 kg car which starts from rest. a. What is the work done? b. What is the final velocity? c. What is the car's momentum? d. What is the car's change in momentum? e. What is the car's Kinetic Energy? f. ...
*Monday, November 14, 2011 at 8:46pm by Ryan*

**physics**

a 1500 kg car accelerates from 0 to 25 m/s in 7.0 s. What is the average power delivered to the engine?
*Sunday, September 26, 2010 at 11:17am by shnook*

**physics**

While blowing its horn of frequency 466 Hz, a car accelerates at 0.84 m/s2. The car starts from rest by your side and moves away. How many seconds does it take for the frequency you hear to decrease by 5%? Hint: Do not forget to include the time it will take for sound to reach...
*Monday, January 31, 2011 at 11:21pm by suuppii .. can anyone help*

**physics**

A car is traveling at a constant speed of 27.1 m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has a constant acceleration. What acceleration must it maintain, so that the two...
*Monday, October 10, 2011 at 6:56am by abbie*

**phyics**

A car is traveling at a constant speed of 31.8 m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has a constant acceleration. What acceleration must it maintain, so that the ...
*Tuesday, September 24, 2013 at 1:06pm by larry*

**Physics**

A 1000 kg car is accelerated from rest to 100 miles/hour in 10 seconds. Find the output power of this car
*Thursday, February 28, 2013 at 10:37pm by Morgan*

**physics**

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on the floor. How much ...
*Wednesday, July 7, 2010 at 6:51pm by Ricky*

**physics**

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on the floor. How much ...
*Wednesday, July 7, 2010 at 6:53pm by Ricky*

**Physics 141**

A mine car (mass mcar = 444 kg) rolls at a speed of vcar = 0.52 m/s on a horizontal track, as the drawing shows. An mcoal = 141 kg chunk of coal has a speed of vcoal = 0.79 m/s when it leaves the chute. Determine the speed of the car-coal system after the coal has come to rest...
*Tuesday, March 11, 2014 at 10:14pm by dakota22*

**phyics**

A mechanic pushes a(n) 3980 kg car from rest to a speed of v, doing 5107 J of work in the process. During this time, the car moves 29.3m. Neglect friction between car and road. Find the speed v. Answer in units of m/s.
*Sunday, February 27, 2011 at 10:33pm by leslie*

**Physics**

A car of mass 1200kg starts from rest, accelerates uniformly to a speed of 4.0 meters per second in 2.0 seconds and continues moving at this constant speed in a horizontal straight line for an additional 10 seconds. the brakes are then applied and the car is brought to rest in...
*Tuesday, December 4, 2012 at 5:00am by Ken*

**Physics**

A car travels 12 km West, 18 km South. What is the total car displacement? The car takes 10 minutes to travel from each initial position to final position. What is the average speed and velocity?
*Wednesday, June 20, 2012 at 4:31am by Helpme*

**physic**

A car is driven east for a distance of 44 km, then north for 25 km, and then in a direction 27° east of north for 28 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Wednesday, March 9, 2011 at 12:00am by keef lam*

**Physics**

A 4.00 103-kg car has a speed of 9 m/s. The car then hits a tree. The tree doesn't move and the car comes to rest. (a) Find the change in kinetic energy of the car. . J (b) Find the amount of work done in pushing in the front of the car. J (c) Find the size of the force that ...
*Thursday, May 10, 2012 at 8:41pm by Haley *

**energy**

A 68 kg student traveling in a car with a constant velocity has a kinetic energy of 1.5 104 J. What is the speedometer reading of the car in km/h?
*Sunday, February 20, 2011 at 8:43pm by big k*

**college physics**

a) A light-rail commuter train accelerates at a rate of 1.25 m/s2. How long does it take it to reach its top speed of 80.0 km/h starting from rest? (b) The same train ordinarily decelerates at a rate of 1.75 m/s2. How long does it take to come to a stop from its top speed? (c...
*Saturday, January 25, 2014 at 2:15am by Melissa*

**physics**

You are the design engineer in charge of the crashworthiness of new automobile models. Cars are tested by smashing them into fixed, massive barriers at 50 km/h (30 mph). A new model of mass 1500 kg takes 0.11 s from the time of impact until it is brought to rest. (Take the ...
*Monday, December 19, 2011 at 3:36pm by Amelia*

**physics**

A 1370 kg car rolling on a horizontal surface has a speed of 20 km/hr when it strikes a horizontal coiled spring and is brought to rest in a distance of 5.5 m. What is the spring constant (in N/m) of the spring? (Ignore nonconservative forces such as friction.)
*Monday, July 2, 2012 at 12:52pm by Lauren*

**Physics**

A 1650 kg car rolling on a horizontal surface has a speed of 20 km/hr when it strikes a horizontal coiled spring and is brought to rest in a distance of 3.5 m. What is the spring constant (in N/m) of the spring? (Ignore nonconservative forces such as friction.)
*Monday, July 8, 2013 at 10:49pm by Sam*

**physics**

A car is driven east for a distance of 42 km, then north for 25 km, and then in a direction 31° east of north for 26 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Friday, September 18, 2009 at 7:41pm by blah*

**physics**

A car is driven east for a distance of 49 km, then north for 21 km, and then in a direction 30° east of north for 27 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Thursday, March 10, 2011 at 5:27pm by tom*

**physics**

A car is driven east for a distance of 41 km, then north for 21 km, and then in a direction 30° east of north for 25 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total displacement ...
*Thursday, September 8, 2011 at 7:28pm by jessica*

**Physics**

Car A is traveling at a constant speed v A = 130 km /h at a location where the speed limit is 100 km/h. The police officer in car P observes this speed via radar. At the moment when A passes P, the police car be- gins to accelerate at the constant rate of 6 m/s 2 until a speed...
*Sunday, September 9, 2007 at 12:58pm by Anonymous*

**Physics - Frequency**

While blowing its horn of frequency 580 Hz, a car accelerates at 0.4 m/s2. The car starts from rest by your side and moves away. How long will it take for the frequency you hear to decrease by 5%? Hint: Do not forget to include the time it will take for sound to reach you.
*Monday, January 25, 2010 at 8:43pm by Intensity*

**Physics**

Having trouble determ the formulas for the follow problems. 2. If an automobile travels at 30 km/hr. for 2 hours, how far does it go? 60 km 3. At time = 0 an automobile already traveling at 30 km/hr. accelerates at 3m/s2 for 2 seconds. During these two seconds, how far does it...
*Saturday, May 29, 2010 at 2:53am by Richard*

**Physics**

A 3.5 kg body accelerates from rest to 20 m/s in 5 s. Calculate: A its acceleration B the force required.
*Sunday, November 21, 2010 at 4:26am by Claire*

**Physics**

A 1500 kg car traveling at 17.6 m/s to the south collides with a 5000 kg truck that is initially at rest at a stoplight. The car and truck stick together and move together after the collision. What is the ﬁnal velocity of the two-vehicle mass? Answer in units of m/s
*Sunday, January 22, 2012 at 5:16pm by Angel*

**Physics -- check answers please**

1. A boy pushes a car to slow it down while the car is rolling horizontally down the road. If the boy pushes backwards on the car with 10N of force as the car rolls forward 3.0m, the amount of work done by the boy is: a)-30 b)0 c)3.3 J d)30 N•m e)300J my answer: a 2. what is ...
*Wednesday, April 2, 2014 at 12:22pm by Jessica*

**physics**

A car starts from rest and accelerates uniformly to a velocity of 8ft/s after traveling 250 ft. Find its acceleretaion. Help me with this pleeaase. Thank you.
*Thursday, September 17, 2009 at 11:22pm by Desiree*

**Science**

A car of mass 1200kg accelerates from rest at a rate of 2m/s^-2. Calculate how long it should take to reach a velocity of 50m/s.
*Saturday, May 25, 2013 at 6:24pm by OHara*

**physics**

A 1.1 pebble is stuck in a tread of a 0.85 diameter automobile tire, held in place by static friction that can be at most 3.9 . The car starts from rest and gradually accelerates on a straight road.How fast is the car moving when the pebble flies out of the tire tread?
*Sunday, March 11, 2012 at 11:07pm by Anonymous*

**Physics**

3/4 = .75 hour at 70 ---> 52.5 1/6 = .167 hr at 95 ---> 15.8 1/2 = .5 hr at 55 ---> 27.5 20/60 = .333 hr at 0 --> 0 total time = 1.75 hours total distance = 95.8 km so 95.8 km / 1.75 hr = 54.7 km/hour
*Wednesday, March 5, 2014 at 3:47pm by Damon*

**Physics ~ CONSERVATION OF MOMENTUM~**

1.) A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? 2.) A 3.0 kg ball at 3 m/s and strikes a 1.5 kg ball moving at -2 m/s. After the ...
*Monday, February 18, 2013 at 6:57pm by Isis*

**Physics **

PLEASE HELP. a 1000 kg car is coasting down the highway at 20 m/s. How much work do friction and air resistance do in bringing the car to rest?
*Monday, March 10, 2014 at 7:15pm by Ritzi*

**physics**

Both car A and car B leave school at the same time, traveling in the same direction. Car A travels at a constant speed of 70 km/h, while car B travels at a constant speed of 88 km/h.How far is Car A from school 2.1 h later?
*Monday, September 10, 2012 at 10:25am by mia*

**math**

A large truck with a mass of 6500·kg and going 20·m/s east collides with a car whose mass is 1100·kg and which is at rest. If the impulse exerted on the car by the truck is 12000·N·s east, find the impulse exerted by the car on the truck. Take east as the postive direction
*Thursday, October 27, 2011 at 9:23pm by jen*

**ap physics**

How fast would a 1200 kg car travel if it had the same linear momentum as a 1500 kg truck traveling at 90 km/h?
*Saturday, January 7, 2012 at 7:52pm by sergio*

**Physics**

At what speed must a 950 kg subcompact car be moving to have the same kinetic energy as a 3.2*10^4 kg truck going 20 km/h ?
*Thursday, May 30, 2013 at 8:35am by Jenny*

**Physics**

The oscillation frequency is f = [1/(2 pi)]sqrt (K/m) K is the overall spring constant of the four springs in parallel. The k for each individual spring is K/4. Use the first equation to solve for k and then use k = K/4. For your second question, m increases from 1400 to 1400...
*Saturday, July 30, 2011 at 9:32pm by drwls*

**Physics**

A car travels at an average speed of 83.2 km/h for 1.00 h and then at an average speed of 42.4 km/h during a second hour. What is the car's average speed during the 2.00 h interval? A car travels 0.98 km at an average speed of 83.2 km/h and then 0.99 km at an average speed of ...
*Wednesday, February 24, 2010 at 1:44pm by Delilah*

**physics**

A car is driven east for a distance of 88 km, then north for 28 km, then in a direction 30 degrees east of north for 25 km. Determine the magnitude of the displacement (in kilometers) of the car from its starting point. thanks!
*Tuesday, June 14, 2011 at 10:41pm by lisa*

**physics**

A drag racer starts her car from rest and accelerates at 9.0 m/s2for the entire distance of 105.0 m. What is its speed at the end of the run? Answer in units of m/s.
*Wednesday, January 11, 2012 at 7:45pm by jen*

**Physics**

A drag racer starts her car from rest and accelerates at 9.0 m/s2for the entire distance of 60.0 m. What is its speed at the end of the run? Answer in units of m/s.
*Wednesday, January 11, 2012 at 7:58pm by Jen*

**physics**

A 36 kg child steps on a scale in an elevator that starts at rest. The elevator then accelerates downward at 0.6 meters per second squared for 1.9 seconds. What is the reading on the scale (in kg)?
*Wednesday, September 26, 2012 at 11:35am by john*

**MATH!!!**

Now the second one is the same theory, again nothing to a power. first column year second column salary 1 28,200 salary increases by $1400 each year. 2 28200+ 1400=29600 3 28200+ 2*1400 =31000 4 28200+ 3*1400 =32400 .... n 28200+(n-1)*(1400)
*Monday, December 10, 2007 at 6:19pm by Damon*

**Math**

That six percent is compounded end of year 1 1.06 * 1400 end of year 2 1.06*1400 + 1.06^2*1400 end of year 3 1.06*1400 + 1.06^2*1400 + 1.06^3*1400 end of year 4 1.06*1400 + 1.06^2*1400 + 1.06^3*1400 +1.06^4*1400 = 1400 (1.06+1.06^2+1.06^3+1.06^4)
*Friday, July 16, 2010 at 11:57pm by Damon*

**Physics**

Please check these answers[my letter choice is in CAPS]: 1. In the steps of the scientific method, what is the next step after formulating and objectively testing hypotheses? A. interpreting results b. stating conclusions c. conducting experiments d. making observations and ...
*Friday, January 30, 2009 at 12:23pm by y912f*

**physics**

Convert the distance (in km) by the time (in hours). 0.65 km/(1/3 h) = 1.95 km/h (or "kph")
*Friday, November 25, 2011 at 6:14am by drwls*

**Physical Science **

A 20,000 kg railroad car is traveling at 3 m/s when it collides and couples with a second, identical car at rest. What is the resulting speed of the combined cars?
*Tuesday, September 24, 2013 at 1:45pm by Jenna V*

**physics**

A car travels 1.72 km in the x direction, then turns left 50.4 degrees to the original direction and travels an additional distance of 1.97 km. Calculate the x component of the car's net displacement. Answer in units of km.
*Thursday, August 27, 2009 at 11:48am by bubba*

**physics**

Assuming maximal power output, how long, in seconds, would it take a 1,535 kg car with a 128 hp engine to accelerate from 50 km/h to 102 km/h? (1 hp = 746 W)
*Tuesday, November 8, 2011 at 8:26am by Lydia*

**physical science**

How much time should be allowed for a 392-km car trip if the car will be traveling at 120 km/h?
*Friday, December 4, 2009 at 8:07am by sandy*

**math**

a car travels at an average speed of 100 km/hr. how many km will the car travel in 2 hours, 15 min?
*Wednesday, February 13, 2013 at 6:21pm by Lori*

**physics**

A 2200-kg sport utility vehicle traveling at 96 km/h can be stopped in 0.15 s if it hits a concrete wall. Assume a 60 kg person was in the car that hit this wall. The velocity of the person equals that of the car both before and after the crash, and the velocity changes in 0....
*Tuesday, October 18, 2011 at 6:35pm by jim*

**physics**

A hydraulic lift has two connected pistons with cross-sectional areas 5 cm2 and 350 cm2. It is filled with oil of density 740 kg/m3. a) What mass must be placed on the small piston to support a car of mass 1400 kg at equal fluid levels? 20 OK HELP: The pressure is constant at ...
*Sunday, November 7, 2010 at 10:12pm by Sarah*

**math**

in an hour the car behind will have travelled 48 km and so would reach the stationary car ? if the stationary car was 96 km ahead it would take 2 hours etc ..
*Friday, July 2, 2010 at 5:45pm by bugsy*

**physics**

A car traveling 90 km/hr is 100 m behind a truck traveling 50 km/hr. How long will it take the car to reach the car?
*Monday, May 23, 2011 at 4:07am by aayushi vyas*

**physics**

A car is driven 105 km west and then 30 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*Monday, September 21, 2009 at 5:47pm by DJ*

**Physics**

A car is driven 135 km west and then 40 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*Tuesday, March 23, 2010 at 8:59pm by Aastha*

**Physics**

A car is driven 135 km west and then 40 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*Tuesday, March 23, 2010 at 8:59pm by Aastha*

**physics**

A car is driven 165 km west and then 25 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*Sunday, September 26, 2010 at 7:43pm by Carol*

**physics**

A car is driven 145 km west and then 65 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*Saturday, December 4, 2010 at 2:07am by Anonymous*

**Physics**

A car is driven 145 km west and then 65 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?
*Saturday, December 4, 2010 at 2:32am by Anonymous*

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