Wednesday

January 18, 2017
Number of results: 19,449

**physics**

Question: You live at the top of a steep (a slope of ???? degrees above the horizontal) hill and must park your 2200 kg car on the street at night. a) You unwisely leave your car out of gear one night and your handbrake fails. Assuming no significant frictional forces are ...

*February 29, 2016 by tom*

**physics**

Just as a car starts to accelerate from rest with an acceleration of 1.4m/s2,a bus moving with a constant speed of 12m/s passes it in a parallel line. 1.How long the car overtakes the bus. 2.How fast will the car then be going. 3.How far will the car then have gone.

*February 4, 2012 by Bash*

**Psychics**

If a railroad car was moving and stroke another car at rest and the two cars then become attached by a special hitch. Does the first car have momentum? Why?

*October 23, 2014 by sarah*

**physics**

a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the collision?

*December 7, 2010 by jacquie*

**physics**

a 2191 kg car moving east at 9.9 m/s collides with a 3221 kg car moving north. the cars stick together and move as a unit after the collision, at an angle of 37.5 north of east at a speed of 5.05 m/s. what is the speed of the 3221 kg car before the collision?

*December 7, 2010 by jacquie*

**Physics**

A 1400 kg car moving south at 10.0 m/s collides with a 2350 kg car moving north. The cars stick together and move as a unit after the collision at a velocity of 5.36 m/s to the north. Find the velocity of the 2350 kg car before the collision. m/s to the south

*October 29, 2014 by Anonymous*

**Physics**

A car travels at a speed of 25 m/s on a flat stretch road. The driver must maintain pressure on the accelerator to keep the car moving at this speed. The car's engine is doing work on the car, yet the kinetic energy of the car is not changing. What is happening to the energy ...

*August 5, 2013 by Rachel.*

**Physics**

A car travels at a speed of 25 m/s on a flat stretch road. The driver must maintain pressure on the accelerator to keep the car moving at this speed. The car's engine is doing work on the car, yet the kinetic energy of the car is not changing. What is happening to the energy ...

*August 5, 2013 by Rachel.*

**Physics**

A 2170 kg car moving east at 10.5 m/s collides with a 3230 kg car moving east. The cars stick together and move east as a unit after the collision at a velocity of 6.00 m/s. a) What is the velocity of the 3230 kg car before the collision? Answer in units of m/s. 016 (part 2 of...

*January 26, 2015 by Chris *

**physics**

A strong man from the circus is being driven in a car which is moving at a constant speed of 5km/h. He decides he will test his strength by trying to stop the car so he pushes on the seat as hard as he can in the direction opposite to the motion of the car. Why is he not able ...

*December 7, 2010 by Anonymous*

**Physics**

An 800.0 kg car containing an 80.0 kg crash dummy is moving at 15 m/s. The car is smashed into a concrete walls and stops in 6.00x10^-2 seconds. What is the change in momentum of the car?

*April 14, 2010 by Michelle*

**Physics**

An engine expends 44.0 hp in moving a car along a level track at a speed of 13.9 m/s. How large is the total force acting on the car in the opposite direction of the motion of the car?

*May 27, 2012 by Darrell*

**Physics**

An engine expends 44.0 hp in moving a car along a level track at a speed of 13.9 m/s. How large is the total force acting on the car in the opposite direction of the motion of the car?

*May 28, 2012 by Jeremy*

**science**

a 10000 kg truck moving at 10 m/s collides with a 2000 kg car moving at 30 m/s in the opposite direction. If they stick together after impact how fast, and in what direction, will they be moving?

*May 19, 2011 by nick*

**physics**

Two cars both start from rest and have the same constant acceleration. When radar is used to measure the velocity of each car, car A is found to be moving twice as fast as car B. At the instant the radar is used, car A has a displacement that is ______ times as great as the ...

*September 13, 2010 by Joey*

**Physics**

A 1500 kg car moving east at 15 m/s collides with a 1730 kg car moving south at 15 m/s and the two cars stick together. What is the velocity of the cars right after the collision? How much kinetic energy was converted to another form during the collision?

*October 25, 2007 by Dante*

**Algebra**

Scientists want to set up and test animals in the area for West Nile. The costs to test are $2,200 for setup plus $1.50 to administer each test. (2200 + 1.5x)/x What is the average cost to test 25 animals?250 animals??1000 animals??? (2200 + 1.5x)=2201.50 *25 =2239.00 Is this ...

*December 14, 2011 by becca *

**Calculus**

"Two cars are traveling along perpendicular roads, car A at 40mph, car B at 60mph. At noon, when car A reaches the intersection, car B is 90miles away, and moving toward it. At 1PM the distance between the cars is changing at what rate?" So lost! Please help!

*January 24, 2012 by Chris*

**Physics**

A car that weighs 14600.0 N is initially moving at a speed of 58.0 km/hr when the brakes are applied and the car is brought to a stop in 4.7 s. Find the magnitude of the force that stops the car, assuming it is constant.

*February 3, 2012 by Katie*

**physics**

A car is coasting backwards down a hill at -5.0 m/s when the driver gets the engine started. After 4 seconds, the car is moving uphill at a velocity of +3 m/s. What is the car’s average acceleration?

*March 6, 2012 by Paigeielynn*

**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.

*August 17, 2011 by Anonymous*

**Physical science**

A car moving at 50km/hr skids 15m with locked brakes. How far will the car skid (with locked brakes if the car moves at 100km/hr assume that the mass of the car is 500kg

*July 20, 2011 by latrice*

**physics**

A compact car, mass 705 kg, is moving at 1.00 102 km/h toward the east. Sketch the moving car. Do this on paper. Your instructor may ask you to turn in this work.. (a) Find the magnitude and direction of its momentum. Draw an arrow on your sketch showing the momentum. kg · m/...

*December 6, 2010 by max*

**physics**

A compact car, mass 705 kg, is moving at 1.00 102 km/h toward the east. Sketch the moving car. Do this on paper. Your instructor may ask you to turn in this work.. (a) Find the magnitude and direction of its momentum. Draw an arrow on your sketch showing the momentum. kg · m/...

*December 6, 2010 by max*

**Science**

A car is moving at a constant velocity when it is involved in a collision.the car comes to rest after 0.45sec with an average acceleration of 65,0 m/s2 in the direction opposite that of the car's velocity. What was the speed ,in km/h, of the car before the collision?

*March 8, 2013 by Gift*

**PHYSICS**

At some amusement parks, to get on a moving "car" the riders first hop onto a moving walkway and then onto the cars themselves. Why is this done? If you are riding on a train that speeds past another train moving in the same direction on an adjacent track, it appears that the ...

*October 13, 2010 by Danielle*

**Physics**

A car accelerates from rest at 2.3m/s^2 for 18 seconds, then decelerates to 15 m/s over 301 meters. A) How fast is the car moving at 18seconds? (Is it 2.3 m/s^2) B) How far does the car travel over the entire trip? (The m/s and m/s^2 is tripping me up) C) How long does it ...

*September 2, 2014 by Emily*

**physics**

A certain car can accelerate from rest to the speed v in time T seconds. (a) If the power output of the car remains constant, how long does it take for the car to accelerate from v to 3v, in terms of T? (b) How fast is the car moving 9T after starting, in terms of v?

*October 17, 2012 by E*

**Science **

A driver of a moving car at 20m/s finds a child on the road 50m ahead and stops the car 10m earlier to the child. If the mass of the car with driver is 1000kg, calculate the force exerted by the brakes of the car??

*December 21, 2016 by Har!@#$%^&h *

**physics**

A 2,000-kg car moving east at 10.0 m/s collides with a 3,000-kg car moving north. The cars stick together and move as a unit after the collision, at an angle of 39.0° north of east and at a speed of 5.15 m/s. Find the speed of the 3,000-kg car before the collision.

*November 12, 2012 by Anonymous*

**PHSC**

Hello, i need help. This is Work-Energy Theorum A car moving at 50km/hr skids 15m with locked brakes. How far will the car skid (with locked brakes if the car moves at 100km/hr assume that the mass of the car is 500kg

*July 20, 2011 by latrice*

**PHYSICS-URGENT HELP**

A stationary police car emits a sound of frequency 1200 Hz that bounces off of a car on the highway and returns to the police car with a frequency of 1250 Hz. The police car is right next to the highway, so the moving car is traveling either directly towards or directly away ...

*July 29, 2011 by Brit*

**physics**

1) What average power is required for a runner with a mass of 85 kg to reach a speed of 8 m/s from a stationary start during a time of 2 s? 2) A 1000 kg car travels east at 30 m/s and collides with a 3400 kg truck travelling south at 20 m/s. After the collision the two ...

*March 29, 2015 by k*

**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**

several students are riding in bumper cars at an amusement park. the combined mass of a car A and its occupants is 250 kg. the combined mass of car B and its occupants is 200 kg. Car A is 15 m away from car B and moving to the right at 2 m/s when the driver decides to bump ...

*June 9, 2008 by shelly*

**Physics**

Suppose that a NASCAR race car is moving to the right with a constant velocity of +92 m/s. What is the average acceleration of the car? (b) Twelve seconds later, the car is halfway around the track and traveling in the opposite direction with the same speed. What is the ...

*September 5, 2011 by Kyle*

**physics**

A car begins at rest at t0 = 0. The car starts moving and finally covers a distance d = 617 m in a time tf = 105 s. In a coordinate system with north being the positive x-direction, the car's motion is in the southern direction. What was the car's average speed during this ...

*September 12, 2014 by joe new*

**Physics**

A 15000 kg railroad car moving 7m/s to the North collides with and sticks to another railroad car of the same mass that is moving the same direction at 1.5 m/s. What type of collision is this? What is the velocity of the joined cars after the collision?

*January 7, 2016 by Victor Olidipo*

**Physics**

A car weighing one ton is moving at 50km/hr and a truck weighing two tons is moving at 25km/hr. Both are moving in the opposite direction, which has more momentum? I think they are the same, but want to make sure

*December 8, 2012 by Katie*

**Physics**

The minimum distance required to stop a car moving at 46.0 mi/h is 39.0 ft. What is the minimum stopping distance for the same car moving at 80.0 mi/h, assuming the same rate of acceleration? Can I do a proportion or is this totally different?

*October 10, 2009 by Beth*

**physics**

You are sitting in a car going 20 m/s relative to the ground and decide to throw a ball backwards with a velocity of 4m/s relative to your car. A person in another car behind you sees the ball moving towards him with a velocity of 2.50 m/s relative to his car. What is the ...

*February 17, 2015 by jyothi*

**physics**

A railroad car with a mass of 1.81 104 kg moving at 3.04 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.32 m/s. What is the decrease in kinetic energy during the collision?

*February 4, 2013 by Jayde Larson*

**physics**

A car moving at 50 km/h skids 15 m with locked brakes. Show that a car moving at 150 km/h will skid 135 m with locked brakes. (Hint: The force doing work during the skidding is the same for both speeds. Use the work–energy theorem.)

*January 6, 2014 by jeremy steadman*

**hw**

A railroad car of mass m = 30000 kg moving at v1 = 2.9 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at v2 = 1.711 m/s. What is the magnitude of the kinetic energy lost in the collision? Answer...

*October 14, 2014 by larry*

**Physics**

A police car is traveling east at 40.0 m/s along a straight road, overtaking a car ahead of it moving east at 30.0 m/s. The police car has a malfunctioning siren that is stuck at 992 Hz. What is the wavelength behind the police car in meters?

*December 6, 2009 by Keith*

**Physics**

Two stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, and car 2 is moving to the left with speed v_0. Car 1 begins to move at t=0, speeding up with a constant acceleration a_x. Car 2 continues to move with a ...

*May 26, 2009 by RJ*

**Physics**

A railroad car with a mass of 1.93 ✕ 104 kg moving at 3.12 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.04 m/s. What is the decrease in kinetic energy during the ...

*October 28, 2014 by Karrie*

**physics**

A compact car, mass 755 kg, is moving at 1.00 ✕ 102 km/h toward the east. The driver of the compact car suddenly applies the brakes hard for 1.8 s. As a result, an average force of 5.8 ✕ 103 N is exerted on the car to slow it down. What is the final velocity of ...

*November 26, 2013 by Anonymous*

**physic**

a 2500 car enters curve with a radius of 45 m .if the car is moving at speed of 35 m/s.what is the centripetal force that maintains the car s circular motion the curve ?

*March 4, 2013 by said *

**Physics**

A 588.6 kN car moving at 1 km/hr instantaneously collides an stationary 392.40 kg car. If the collision is perfectly inelastic, what is the velocity of the car after collision?

*April 20, 2016 by ced*

**COLLEGE PHYSICS**

A rollercoaster car of mass 600.0 kg is moving 2.4m/s at the top of a peak that is 25m off the ground. The car moves down slope and up the next hill. Assume that it loses 20,000J of energy by the next time it gets to the top of the next peak due to friction forces. If the ...

*May 31, 2008 by sarah*

**physics**

A car begins at rest at t0 = 0. The car starts moving and finally covers a distance d = 617 m in a time tf = 105 s. In a coordinate system with north being the positive x-direction, the car's motion is in the southern direction (see figure. What was the car's average speed ...

*September 12, 2014 by joe 13*

**Physics**

a car and a truck start from rest at the same instant with the car initially 50m behind the truck. The truck has a constant acceleration of 2m/s^2 and the car has a constant acceleration of 3m/s^2. The car overtakes the truck after how many seconds? At what speed is the car ...

*February 25, 2014 by Sergio*

**Physics**

a train is moving at 45km/h when a coupling breaks and the last car separates from the train. as soon as the car separates, the brakes are automatically applied, locking all wheels of the runaway car and causing a uniform decelaration of 5 m/s^2. determine the distance the car...

*February 19, 2012 by marco*

**physics**

A car moving at 62 mi/h can be brought to rest in 4.8 s. Assuming that the deceleration is uniform, how far will the car travel between the time the brakes are applied and the time the car stops?

*September 18, 2011 by Adnane*

**PHYSICS**

A car is traveling around a circular banked road without friction which is inclined at 24 degrees. When the car is traveling at 18.2 m/s around the road, it is moving at the bottom on the incline (inner radius of the road when viewed from an aerial view). When the car is ...

*October 21, 2011 by Anonymous*

**physics**

Two cars are traveling in opposite directions on a two lane road. Car A starts from the origin at t =0 and accelerates (moving due East) from rest at 4 m/s2. At t = 0, Car B is moving due West with a velocity of 15 m/s and is 500 m east of car A but accelerating toward the ...

*February 16, 2011 by jake*

**physics**

A car weighing 1.0 x 10^4N is parked on a 34 degree slope. The brakes fail and the car starts to slide down the hill. Assume no friction. Show your work, and determine a) the acceleration of the car, and b) after it has moved 28.0 m, how fast is it moving?

*November 2, 2014 by Andy*

**science- physics**

A car is traveling at a steady 90 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.3 m/s/s.How much time elapses before the motorcycle is moving as fast as the car? How far is the motorcycle from the car when it...

*September 27, 2015 by Laura*

**hmmmmm...........**

How can moving contiental plates change the surface of earth http://www.google.com/search?q=moving+continental+plates&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official Good websites linked here. =) what plate is iceland on how can moving continental ...

*October 17, 2006 by Jenny*

**physics**

a car of mass 500kg is moving at 24m/s. A lion of mass 100kg drops on to the roof of the car from an overhanging branch. Show that the car will slow down to 20m/s.

*January 14, 2012 by sepira*

**Physics**

A car, moving along a straight stretch of highway, begins to accelerate at 0.0235 m/s 2 It takes the car 67.8 s to cover 1 km.How fast was the car going when it first began to accelerate?

*October 27, 2014 by Anonymous*

**Help!**

How are Boolean search strategies and other search filters useful? A.They organize results alphabetically. B.They narrow the search results. C.They increase the number of search results. D.They find creative sources. Please help me!

*April 30, 2014 by Kalie*

**physics**

A car (mass = 750 kg) is initially moving with velocity 30 m/s. The driver slowly presses on the brakes and bring the car to a stop, traveling 50 m in the process. Calculate the force of friction between the car and the ground that brings it to a stop. Draw a free-body diagram...

*January 19, 2015 by Cassie*

**Physics**

A truck is moving away at 30 mph from a car moving towards the truck at 60 mph. If the truck emits a horn of frequency 500 Hz, what frequency does the driver of the car hear to 3 significant digits? how do i solve i know the answer is 519hz but how?

*February 23, 2016 by Victor*

**physics**

Two cars have a head-on collision.Both were traveling at 37 m/s toward each other.Car A has a mass of 432 KG.Car B has a mass of 90 KG. After impact,car A is moving backward at 3 m/s. What car B's velocity after impact?

*November 15, 2010 by Mayte*

**math**

could someone help me revise these Inequalities problems? my answers are under the question... For questions, #3 #4 and #5 my teacher said "equals as well?" For question #8 my teacher said "where's the inequality sign?" 3. Joe expects to spend at least $8500 on a used car, but...

*October 1, 2015 by Abby *

**physics**

a car moving on a straight road with a speed of 20m/s. at t=0 the driver of the car applies the breaks after watching an obstacle 150m ahead. after application of breaks, the car retards with 2m/s^2. find the position of the car from the obstacle at t=15s.

*July 3, 2011 by pavatharani*

**physics**

From a vantage point very close to the track at a stock car race, you hear the sound emitted by a moving car. You detect a frequency that is 0.86 times as small as that emitted by the car when it is stationary. The speed of sound is 343 m/s. what is the speed of the car?

*November 18, 2012 by Joe*

**physics ( please help me)**

a railroad handcar is moving along striaght, fricionless tracks. In each of the following cases the car initially has a total mass (car and contents of magniude 4.00 m/s^1. Find the final velocity of the car in each of the three cases. A) a 40.0 kg mass is thown sideways out ...

*April 3, 2012 by taylor*

**Math**

A car moving at 4.5 m/s accelerates at 2.5 m/s square. How fast will it be moving after 7.5 seconds ?

*April 22, 2013 by Aayushman*

**information literacy**

4. Which of the following statements about human-power search engines is true? A. People code the search engine so that they'll populate lists of trending search terms and phrases. B. Links are selected by users. C. Users send in their search request and then the search ...

*August 27, 2015 by francis*

**physics**

A car is coasting backwards downhill at a speed of 3.2 m/s when the driver gets the engine started. After 2.5 s, the car is moving uphill at 5.0 m/s. Assuming that the uphill is the positive direction, what is the car's average acceleration?

*November 26, 2010 by javane*

**physics**

A car is coasting backwards downhill at a speed of 2.6 m/s when the driver gets the engine started. After 2.5 s, the car is moving uphill at 4.6 m/s. Assuming that the uphill is the positive direction, what is the car's average acceleration?

*September 18, 2012 by LIZZIE*

**physics**

1. A car is coasting backwards downhill at a speed of 3.0 m/s when the driver gets the engine started. After 2.5 s, the car is moving uphill at 4.5 m/s. Assuming that uphill is positive direction, what is the car’s average acceleration?

*June 7, 2013 by asa*

**math**

a car moving at 4.5 m/s accelerates at 2.5 m/s2. How far will it be moving after 7 seconds.

*April 22, 2013 by Aayushman*

**Educational Technology and Online Learning**

How are boolean search strategies and other search filters useful? a. They organize results alphabetically b. They narrow the search results c. They increase the number of search results ******* d. They find creative sources

*April 9, 2014 by Lilly*

**writing**

Bing (common search engine) iSEEK Education (academic search engine) MetaLib metasearch engine) ( What types of information did each search provide? Discuss what features you like and dislike about each of the search engines.

*September 18, 2014 by jill*

**Physics**

A small plane moving at 207km/hr flying 50.0m above the ground chases a convertible moving at 105km/hr down a straight highway. The plane has a package to drop in the car’s back seat. Assuming the vehicles maintain their speed and altitude and there is no air resistance, how...

*September 18, 2014 by Mercedes *

**Physics**

Question about doppler effect: How do you solve when it gives you percentage value? (Q 1) How do you calculate for doppler effect when the listener is moving instead of the source of sound? (Q 2) Questions 1. As a racing car zooms by you, its pitch decreases by 20%. If the ...

*November 25, 2009 by Tommy*

**Algebra**

While traveling in a car, the centrifugal force a passenger experiences as the car drives in a circle varies jointly as the mass of the passenger and the square of the speed of the car. If the a passenger experiences a force of 100.8 newtons when the car is moving at a speed ...

*March 16, 2010 by Anonymous*

**physics**

A car, moving along a straight stretch of highway, begins to accelerate at 0.0218 m/s 2 . It takes the car 86 s to cover 2 km. How fast was the car going when it ﬁrst began to accelerate? Answer in units of m/

*September 28, 2011 by bluh*

**Physics **

9)A car, moving along a straight stretch of highway, begins to accelerate at 0.0153 m/s 2 . It takes the car 29.2 s to cover 1 km. How fast was the car going when it ﬁrst began to accelerate? Answer in units of m/s

*November 4, 2012 by Savannah*

**physics**

moving car runs into stationary car, (against a wall)car does not move, however, the wall push back cancelling the force. Explain Newton's law that apply. Thanks, George

*December 22, 2012 by george*

**Physics **

A car, moving along a straight stretch of high- way, begins to accelerate at 0.014 m/s2. It takes the car 23.2 s to cover 1 km. How fast was the car going when it first began to accelerate? Answer in units of m/s.

*September 24, 2015 by Bob*

**Physics**

A car, moving along a straight stretch of high- way, begins to accelerate at 0.0377 m/s2. It takes the car 34.3 s to cover 1 km. How fast was the car going when it first began to accelerate? Answer in units of m/s.

*November 23, 2015 by kate*

**Physicas**

A 12000 kg truck strikes the back end of a 750 kg car moving at 15 m/s. If the truck loses 7500 kg-m/s of its momentum to the car, what is the car's velocity after the collision? I'm not sure how to solve this one... Help please?!

*November 22, 2016 by Emilee*

**Physics**

A 12000 kg truck strikes the back end of a 750 kg car moving at 15 m/s. If the truck loses 7500 kg-m/s of its momentum to the car, what is the car's velocity after the collision? I'm not sure how to solve this one... Help please?!

*November 22, 2016 by Emilee*

**physics**

A car has a mass of 1500 kg. If the driver applies the brakes while on a gravel road, the maximum friction force that the tires can provide without skidding is about 7000 N. If the car is moving at 18 m/s, what is the shortest distance in which the car can stop safely?

*September 22, 2014 by Josh*

**physics**

A car of mass 1400kg moving south at 11m/s collides into another car of mass 1800kg moving east at 30m/s.The cars are stock together after the collision.Determine the velocity of the cars immediately after the collision.

*March 16, 2016 by Pihu*

**phy**

A car of mass 1400kg moving south at 11m/s collides into another car of mass 1800kg moving east at 30m/s.The cars are stock together after the collision.Determine the velocity of the cars immediately after the collision.

*March 25, 2016 by pawan mandal *

**Physics**

A car travels at a speed of 25 m/s on a flat stretch of road. The driver must maitain pressure on the accelerator to keep the car moving at a constant speed. Are there any forces doing work on the car? Explain. What is the net force?

*February 3, 2011 by Kourt*

**Physics**

A car travels at a speed of 25 m/s on a flat stretch of road. The driver must maitain pressure on the accelerator to keep the car moving at a constant speed. Are there any forces doing work on the car? Explain. What is the net force?

*February 3, 2011 by Kourt*

**Physics Distance and Displacement Question? **

A passenger in the rear seat of a car moving at a steady speed is at rest relative to the side of the road. a pedestrian on the corner ahead. the front seat of the car. the wheels of the car. Thanks ^_^

*January 17, 2012 by Amber*

**Physics B**

A car, moving along a straight stretch of highway, begins to accelerate at 0.0261 m/s2. It takes the car 48.6 s to cover 1 km. How fast was the car going when it first began to accelerate? Answer in units of m/s Couldn't find a formula for this :(

*September 1, 2014 by Isaac*

**physics**

A 2200-kg sport utility vehicle traveling at 96 km/h can be stopped in 0.21 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....

*December 6, 2010 by lets go*

**Physics**

A 1200 kg car pulls an 820 kg trailer over a rough road. The force of friction acting on the trailer is 650 N [backwards]. Calculate the force that the car exerts on the trailer if (a) the trailer is moving at a constant velocity of 30 km/h [forward] (b) the trailer is moving ...

*November 16, 2014 by Jenuson*

**physics**

The Mini Cooper is rated at a maximum power of 115. hp (1 hp=746 W), when moving at 80.0 km/h. Assume that the net force accelerating the car is constant. The total mass of the car with a rider and some fuel is 1230 kg. How many seconds will it take for this car to go from ...

*January 11, 2011 by noreen*

**Physics**

A car going 50mi/h overtakes and passes another car moving at 45 mi/h. what length of road is required for the operation? assume that each car is 15 ft long and that there is a 60-ft space between them before and after passing. taking into account the approach of a car from ...

*March 20, 2011 by Peter Adrian Ngo*

**Math**

A car is stopped at a red light, and starts moving at time t = 0 when the light turns green, with an acceleration given by a(t) = √t, with t given in seconds, and distances given in metres. a) Find a formula for the velocity v(t), via integration. b) How long will it ...

*June 6, 2016 by Mr Homie*