Saturday

August 2, 2014

August 2, 2014

Number of results: 33,208

**physics**

A car acclerates uniformly from to a rest to a speed 23.7 km/h in 6.5 s.Find the car travels during the time.(Displacement with constant uniform accleration).My only problem is the conversion
*September 13, 2012 by A person*

**Physics**

A car is driven at a constant speed of 76 km/h down a road. The car's engine delivers 48 kW of power. Calculate the average force that is resisting the motion of the car. Enter a number.1 N
*December 9, 2009 by Manny Aragon*

**physical science**

A car travels through a school zone at a speed of 36 m/s was the 45 mi/h speed limit exceeded? yes or no
*January 9, 2014 by Dina*

**physics**

A car travels due east with a speed of 35.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 70.0° with the vertical. Find the velocity of the rain with respect to the ...
*February 17, 2011 by kia*

**physics**

A car travels due east with a speed of 35.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 70.0° with the vertical. Find the velocity of the rain with respect to the ...
*February 18, 2011 by Anonymous*

**Physics **

7. A formula 1 racecar is capable of very quick starts (with a launch control system, that prevents the wheels from spinning during rapid acceleration)). A 2011 Ferrari (driven by none other than Agent 001) is initially at rest, and undergoes a constant acceleration of 14 m/s^...
*February 13, 2013 by Navmeet*

**physics**

A body travels along a circular path of radius 70 m.After travelling half a revolution in 20 s find the ; 1.average velocity 2.average speed
*June 21, 2011 by Saurabh*

**Math**

what value of m will make 4x-7y=5 and 9x+my=3 parallel? a car leaves town A at 10:00 a.m. and travels at a constant speed of 40 kph towards a town B. After 30 minutes, a bus leaves town A and travels towards town B at a constant speed of 56 kph. at what time will the bus catch...
*September 22, 2013 by Riza*

**physics**

A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car completes the turn in 38.0 s. (a) What is the acceleration when the car is at B located at an angle of 35.0...
*October 24, 2011 by carlton*

**AP Physics**

To test the performance of its tires, a car travels along a perfectly ﬂat (no banking) circular track of radius 120 m. The car increases its speed at uniform rate of at ≡ d |v| dt = 2.99 m/s 2 until the tires start to skid. If the tires start to skid when the car ...
*October 24, 2012 by Noah*

**physic**

Average Speed 1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from the sun reaches Earth in 8.3 min. The speed of light is 3.0108 m/s. How far is Earth from the sun? 3. In Major League Baseball, the distance between...
*November 3, 2011 by ray*

**physics**

A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 40.0 min at 85.0 km/h, 12.0 min at 95 km/h, and 35.0 min at 30.0 km/h, and spends 35.0 min eating lunch and buying gas. Determine the average speed for the ...
*September 13, 2011 by gigi*

**physics**

A 783 kg car travels along US 321. What net force is required to keep the car traveling at a constant speed of 28.8 mph around a curve whose radius is 26.4 m?
*November 20, 2009 by Alex*

**Physics**

Hello! I was wondering if I could get some help solving this problem? A car travels at a constant speed of 10.0 m/s along a straight highway that is inclined 6.0 degrees for 11.0 s. How high vertically does the car travel?
*September 23, 2010 by Gusty*

**Physics**

Hello! I was wondering if I could get some help solving this problem? A car travels at a constant speed of 10.0 m/s along a straight highway that is inclined 6.0 degrees for 11.0 s. How high vertically does the car travel?
*September 23, 2010 by Gusty*

**Algebra Continued**

2)A motorboat leaves a dock and travels at an average speed of 15mi/h toward an island. The average speed on the return trip is 10mi/h. How far is the island from the harbor if the total trip takes 5h? (HInt-first find the 2 times)
*September 23, 2008 by Chris*

**physics**

Its 80 kilometers from point A to point B. Someone travels at an average speed of 40 kilometers per day and takes a negligible amount of time at point B to turn around to head back to point A. At what average speed must the person travel back to point A so that for the entire ...
*January 29, 2012 by Anonymous*

**algebra**

Two drivers travel 150 miles on a freeway and then stop at a wayside rest area. The first driver travels 5 miles per hour faster and arrives 1/7 hour ahead of the second. Find the average speed of each car.
*August 17, 2011 by mich*

**physics**

A Honda Civic travels in a straight line along a road. Its distance x from a stop sign is given as a function of time t by the equation x(t)= α t2− β t3, where α = 1.43m/s2 and β = 4.60×10−2m/s3 . 1)Calculate the average velocity of the car for ...
*July 23, 2014 by Ann*

**phisecs**

A car travels in a stright line at 43 km/h for 1 h and at 65 km/h for 5 h. Find the average velocity in km/h?
*February 19, 2014 by neon *

**physics**

A 726 kg car travels from Boone to Blowing Rock along US321. How much working is needed to keep the car traveling at a constant speed of 21.8 m/s around a curve of radius 28.4 m?
*December 5, 2010 by KC*

**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*

**algebra**

Car A leaves a certain point traveling at an average speed of 40 mph. 3 hours later, car B leaves the same point traveling at an average speed of 55 mph. How soon will B catch up to A? 4 6 8 10
*May 19, 2013 by Callie*

**Physics**

A truck travels at a constant speed of 28.0 m/s in the fast lane of a two-lane highway. It approaches a stationay car stopped at the side of the road. When the truck is still 1.2x10^2 m behind the car, the car pulls out into the slow lane with an acceleration of 2.6 m/s ...
*July 10, 2011 by Capreeca*

**simple physics**

A 1500 kg car travels along the road at 25 m/s when the driver sees the light turn red and applies the brakes. What average force is needed to stop the car in a) 5 seconds and b) .2 seconds? What formula should be used?
*December 4, 2011 by JuJu*

**physics**

Question Part Points Submissions Used 1 2 3 4 5 0/5 –/5 5/5 0/5 0/5 1/10 0/10 1/10 2/10 2/10 Total 5/25 A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car ...
*October 22, 2011 by carlton*

**science**

a car manufacture advertise that a car goes "from zero to sixty in 8 seconds" is a description of: a) average speed b) instantaneous speed c) average velocity d) instantaneous acceleration a) and b) are incorrect since it's a change in velocity, whcih means it's acceleration. ...
*September 6, 2007 by Tammy*

**math**

You jog at 6.6 mi/h for 5.0 mi, then you jump into a car and drive for another 5.0 mi. With what average speed must you drive if your average speed for the entire 10.0 miles is to be 10.4 mi/h? answer is 24.5 mi/h. WHY??
*August 19, 2009 by jawn*

**physics**

You jog at 6.2 mi/h for 5.0 mi, then you jump into a car and drive for another 5.0 mi. With what average speed must you drive if your average speed for the entire 10.0 miles is to be 10.6 mi/h? I don't get why the answer isn't 15.
*November 1, 2011 by John*

**Math**

A family left their house in two cars at the same time. One car traveled an average of 7 miles per hour faster than the order. When the first car arrived at the destination after 5 1/2 hours of driving, both cars had driven 599.5 miles. If the second car continues at the same ...
*March 3, 2014 by naveen*

**physic**

Block _____ Name ________________________________________ Date __________ Average Speed 1. In the 2008 Summer Olympics, Usain Bolt won the 100-m race in 9.69 s. What was his average speed? 2. Light from the sun reaches Earth in 8.3 min. The speed of light is 3.0108 m/s. How ...
*November 3, 2011 by Anonymous*

**Physics**

Sally travels by car from one city to another. She drives for 40.2 min at 80.0 km/h, 12.0 min at 105 km/h, and 45.0 min at 40.0 km/h. She spends 13.7 min eating lunch and buying gas. (a) Determine the total distance traveled in km. (b) Determine the average speed for the trip ...
*January 26, 2012 by Paige*

**math**

a car travels at a constants speed and uses G(x) litres of gas per kilomotre, where x is the speed of the car in kilomotres oer hour and G(x)=(1280+x^2)/(320x) a>if fuel costs 1.29 per litre, determine the cost function C(x)that expresses the cost of the fuel for a 200KM ...
*October 31, 2011 by invy*

**math**

a bus takes 12 hours to travel the same distance that an airplane travels in 1.5 hours. the average speed of the airplane ia 120 km per hour faster than five times the average speed of the bus. what is the average speed of the bus? let x represent the speed of the bus speed of...
*November 29, 2006 by aaron*

**Physics**

A automobile travels at a speed of northward along a street, and a 7000-N sports car travels at a speed of eastward along an intersecting street. (a) If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the velocity of the cars be ...
*December 19, 2013 by Bryan*

**Physics**

An 893 kg car passes over a bump in a road that follows the arc of a circle of radius 14.3 meters. A) What force does the road exert on the car as the car passes the highest point of the bump if the car travels 7.53 m/s. B) What is the max speed the car can have as it passes ...
*December 4, 2011 by Ryan*

**physics**

You jog at 6.0 mi/h for 5.0 mi, then you jump into a car and drive for another 5.0 mi. With what average speed must you drive if your average speed for the entire 10.0 miles is to be 10.0 mi/h?
*September 9, 2010 by Anonymous*

**physics**

You jog at 6.0 mi/h for 5.0 mi, then you jump into a car and drive for another 5.0 mi. With what average speed must you drive if your average speed for the entire 10.0 miles is to be 10.0 mi/h?
*September 9, 2010 by Anonymous*

**physics**

You jog at 6.0 mi/h for 5.0 mi, then you jump into a car and drive for another 5.0 mi. With what average speed must you drive if your average speed for the entire 10.0 miles is to be 10.0 mi/h?
*September 9, 2010 by Anonymous*

**Algebra**

Yes. The car will travel 40 miles in an hour. A certain Car Travels 14 miles in 21 minutes. If the car continues at the same speed how many miles can it go in 1 Hour One way to solve this problem is by setting up a proportion. Let x = the miles the car can go in one hour. 14...
*June 26, 2007 by Ms. Sue*

**math**

Two cars leave the same point at noon. One car travels North and the other car travels East. Suppose the North bound car is travling 40mph and after two hours, the two cars are 100 miles apart. How fast is the other car going?
*November 2, 2012 by dell*

**Math**

the trip will be 560 miles the bus travels at an average speed of 60 miles per hour. Estimate the distance the bus travels in 2 hours.
*September 10, 2008 by Jessica*

**science (motion)**

You are walking toward the back of a bus that is moving forward with a constant velocity. Describe your motion relative to the bus and relative to a point on the ground. A car travels at an average speed of 30 m/s for .8 h. Find the total distance traveled in km.
*April 29, 2009 by lol*

**math 10 pre calculus**

12. An avalanche rescue team travels 8.55 km along a snow-covered trail. For the first section, the trail is flat. The team averages a speed of 2.7 km/h. Then, the terrain becomes mountainous and their average speed is only 1.2 km/h. The one-way trip takes the team 4.0 h. ...
*December 14, 2012 by Eric*

**Physics**

a car travels at 25m/s on a flat stretch of road. The driver must maintaint he pressure on the accelerator to keep the care moving at this speed. What is the net work done on the car over a distance of 250m?
*September 25, 2013 by Sara*

**Physics**

a car travels at 25m/s on a flat stretch of road. The driver must maintaint he pressure on the accelerator to keep the care moving at this speed. What is the net work done on the car over a distance of 250m?
*September 25, 2013 by Sara*

**physics ( math)**

Solve the Equations in terms of X: a. x/a = b/c b. s=xt^2/2 d. 4= 10/x e. 5= 5/x-5 f. 40=2((x10)2-5) g. x(y+2)/ (5y +8) 1.What is the average of 2/9 and 4/5? 2. Subtract 4.20 x 10^-5 from 6.468 x 10^-4 3.Given: D= density; M= Mass; V= Volume; and D= M/V a) If an object has a ...
*September 9, 2010 by K.C*

**ENG102**

Question 1. A car moves 26 km due east then 14 km due north. It then turns along a path running north-east with 15 km, then 17 km due west. If the time for the entire journey is 2 hrs, Find; (a) the car’s average speed in m/s (b) the car’s average velocity in km/h . SOLVE THIS...
*May 1, 2012 by DESMOND*

**Physics**

a car manufacture advertise that a car goes "from zero to sixty in 8 seconds" is a description of: a) average speed b) instantaneous speed c) average velocity d) instantaneous acceleration a) and b) are incorrect since it's a change in velocity, whcih means it's acceleration. ...
*September 9, 2007 by Tammy*

**Calculus**

A car starts from point P at time t=0 and travels at 45 mph. A)write an expression d(t) for the distance the car travels from p. (would it just be y=45x??) B)What is the slope of the graph? what does it have to do with the Car? D)Create a scenario in which t could have ...
*August 24, 2011 by Sarah*

**algebra**

A car travels down the highway at speeds between 50 miles per hour and 65 miles per hour. If the car travels for 4 hours, write an expression that represents the distance, d, the car has travelled.
*November 1, 2013 by lala*

**physics**

A car travels 2.74 km in the x-direction, then turns left 61.2◦to the original direction and travels an additional distance of 3.19 km. Calculate the x component of the car’s net displacement.
*July 30, 2014 by Anonymous*

**hw**

A car travels along a straight road, heading east for 1 h, then traveling for 30 min on another road that leads northeast. If the car has maintained a constant speed of 56 mi/h, how far is it from its starting position?
*November 24, 2010 by Anonymous*

**Physics**

A 15500 N automobile travels at a speed of 41 km/h northward along a street, and a 7000 N sports car travels at a speed of 65 km/h eastward along an intersecting street. a)If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the ...
*December 11, 2010 by Kelsey*

**Physics- hard problem**

A 14000 N automobile travels at a speed of 40 km/h northward along a street, and a 7000 N sports car travels at a speed of 62 km/h eastward along an intersecting street.(a) If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the ...
*December 19, 2013 by Bryan*

**maths**

If a van travels for a distance of 18 km at an average speed of 75 km/h and then for a distance of 63 km at an average speed of 90 km/h, what is the total time for the journey in minutes, to the nearest minute?
*April 7, 2012 by karen*

**Physics**

You step onto a hot beach with your bare feet. A nerve impulse, generated in your foot, travels through your nervous system at an average speed of 113 m/s. How much time does it take for the impulse, which travels a distance of 1.50 m, to reach your brain?
*September 26, 2010 by Amanda*

**Physics**

A car is initially travelling at a constant speed of 20 m/s along a highway. Suddenly, the driver applies the brakes, causing the car to accelerate at -5.0 m/s^2. If the driver applied the brakes 0.50s late, determine the distance the car travels from the moment the driver is ...
*September 11, 2012 by Michael*

**physics**

a person walks due east for 10 meters and the due north for 10 meters. what is the total distance? b). what is the average speed of a car that travels 30 meters in 10 seconds, then another 50 meters in 30 seconds. Thank you for answering.
*June 3, 2014 by mercy*

**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.
*August 27, 2009 by bubba*

**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*

**physics**

A car travels from city a to city b at a constant speed of 60 km/h.A bus leaves city a 1h after the car and catches it as it enters city b.the distance betwen ehe cities is 240 km.what is the speed of the bus{assumed to be constant] during its journey
*December 17, 2011 by faisal*

**physics**

A car travels from city a to city b at a constant speed of 60 km/h.A bus leaves city a 1h after the car and catches it as it enters city b.the distance betwen the cities is 240 km.what is the speed of the bus{assumed to be constant] during its journey
*December 17, 2011 by faisal*

**physics**

A car travels in a straight line with an average velocity of 85 km/h for 2.5 h and then with an average velocity of 30 km/h for 1.5 h. (a) What is the total displacement for the 4 h trip? _____________________ km (b) What is the average velocity for the total trip? ...
*September 12, 2010 by MeganErin*

**Physics**

You step onto a hot beach with your bare feet. A nerve impulse, generated in your foot, travels through your nervous system at an average speed of 106 m/s. How much time does it take for the impulse, which travels a distance of 1.80 m, to reach your brain? _____________s
*September 12, 2011 by Dwight*

**physics**

Please decide which of the following statements for car collisions are true or false. 1)Crumple zones on cars are parts of the front of the car that are designed to receive maximum deformation during a head-on collision. The essential safety benefit of crumple zones results ...
*April 11, 2012 by Marc*

**Physics**

A 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop. (a) What will be the car's stopping distance for dry pavement (µ = 0.85)? (b) What will be the ...
*September 21, 2010 by Tom*

**physics**

A 1100 kg car coasts on a horizontal road with a speed of 19 m/s. After crossing a an unpaved, sandy stretch of road 32 m long, its speed decreases to 12 m/s. (a) Was the net force done on the car positive, negative, or zero? Explain (b) Find the magnitude of the average net ...
*April 17, 2013 by phirum*

**physics**

2. A car of mass 1540 kg traveling at 28 m/s is at the foot of a hill that rises 125 m in 3.6 km. At the top of the hill, the speed of the car is 8 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses.
*October 5, 2010 by rizzo*

**physics**

A car of mass 1410 kg traveling at 26 m/s is at the foot of a hill that rises 115 m in 4 km. At the top of the hill, the speed of the car is 14 m/s. Find the average power delivered by the car's engine, neglecting any frictional losses.
*October 4, 2012 by Rodrigo*

**Physics**

How large an average force is required to stop a 1400-kg car in 5.0 s if the car’s initial speed is 25 m/s?
*March 12, 2014 by Bola*

**Physics**

A car travels 150 km for two hours east of a starting point, turns around and travels due west 300 km for three hours. What is the car's net velocity for the trip?
*February 25, 2013 by Gabby*

**SCIENCE(PHYSICS)**

A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train. My Solution:-1st hr. distance=40 multiplied by 0.2=8km 2nd hr.= 50 multiplied by 0.2=10km 3rd hr. =60 multiplied by 0.4=24 km Average speed=10+24+8 ...
*May 25, 2011 by YASH*

**Physics**

A car travels a total distance of 3.22911x10^2 m to the East in 6.7135x10^1 s. What is the speed of the car, in m/s with 4 significant figures? Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10
*October 12, 2010 by HELP*

**Physics**

A car travels the same distance at constant speed around two curves, one with twice the radius of curvature of the other. For which of these curves is the change of the velocity of the car greater? Explain.
*March 8, 2012 by Nikki*

**Algebra**

Two cars start at the same point at Alexandria, verginia, and travel 2 opposite directions. One car travels 5 miles per hour faster than the other car. After 4 hours, the two cars are 420 miles apart. Find the speed of each car.
*March 28, 2013 by Lora*

**physics**

choose the correct answer and why? a car starts from rest and reaches speed of 80 km/h in 16 s the average acceleration of the car is: a\ 0.7 m/s*2 b\1.4 m/s*2 c\5 m/s*2
*February 20, 2014 by Reem*

**physics**

what is the speed of a car in km/n if it travels 108 km. in 1 min.?
*June 28, 2011 by junna rose*

**Physics**

A student throws a ball vertically upward such that it travels 9.0 m to its maximum height. If the ball is caught at the initial height 2.4s after being thrown, what is the ball's average speed? I know average speed is change in distance over change in time, but I don't know ...
*November 28, 2007 by Jacob*

**Physics**

A 14000 N automobile travels at a speed of 50 km/h northward along a street, and a 7500 N sports car travels at a speed of 62 km/h eastward along an intersecting street. (a) If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the ...
*November 24, 2010 by Jen*

**Physics**

A 14000 N automobile travels at a speed of 50 km/h northward along a street, and a 7500 N sports car travels at a speed of 62 km/h eastward along an intersecting street. (a) If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the ...
*November 24, 2010 by Sandi*

**6th grade math**

A girl's basketball team is playing in the Texas state championship game. They are going 560 miles from El Paso to San Antonio. Their bus yep travels at an average speed of 60 miles per hour. A. Suppose the bus travels at an hour almost steady speed throughout the trip. Make a...
*April 17, 2014 by AT*

**Science Check**

1)Two balls having the same mass of 1 kg roll toward each other, each moving at the same speed of 1 m/s. What is the combinded momentum? Would it be 0 kg m/s 2)A 30 kg girl and a 25kg boy face each other on friction free roller blades. The girl pushes the boy who moves away at...
*March 9, 2007 by Abby*

**Physics**

A car is traveling a road that makes quarter of a circle with a constant speed. What is the magnitude of the average velocity of the car?
*March 1, 2011 by Jasalle*

**physics**

A car moving with an initial speed v collides with a second stationary car that is 50.7 percent as massive. After the collision the first car moves in the same direction as before with a speed that is 33.2 percent of the original speed. Calculate the final speed of the second ...
*March 26, 2014 by Erin*

**Physics**

A roller coaster car of mass 1000kg is riding along a track from point A to point C. (point A is 75m high, B is 50m high and C is 100m high, so that there are a total of three hills.) the final velocity at point C is 10m/s a) Assume no friction what is the speed of the car at ...
*November 14, 2007 by Tammy*

**math**

distance = rate x time or d = r*t car traveling 40 mi/hr goes 40 mi/hr x 1.5 hrs head start or 60 miles head start. Let t = time bus and car travel. car travels distance of r*t = 40*t. Car already had 60 mi head start. Total distance car traveled is 60 + 40*t. distance bus ...
*August 16, 2007 by DrBob222*

**Physics**

Car travels up hill at a constant speed of 50 km/h and returns down the hill at a constant speed of 65 km/h. Calculate the avg speed for the round trip in km/h.
*September 22, 2011 by JP*

**distance problem**

A car travels 20 km/h faster than a truck. The car covers 360 km in 3 hours less time than the truck.Find the speed of the truck. (kindly write the solution, thanks alot)
*December 17, 2012 by HELP HELP MNHS*

**Physics**

a car brakes to a halt in 5 seconds. The position of the car versus time is given by: x = 10t - t^2 a) What is the average speed between 0 s. and 4 s.?
*September 20, 2011 by Rafael*

**Physicss**

a car brakes to a halt in 5 seconds. The position of the car versus time is given by: x = 10t - t^2 a) What is the average speed between 0 s. and 4 s.? Thank you
*September 20, 2011 by Rafael*

**physics**

a car brakes to a halt in 5 seconds. The position of the car versus time is given by: x = 10t - t^2 a) What is the average speed between 0 s. and 4 s.? Thank you
*September 21, 2011 by Raf*

**prealgerbra**

A car travels at a speed of 44 feet per second. What is the speed in miles per hour? Show all work
*January 24, 2012 by steph*

**physics**

If a runner travels at a speed of 10 m/s for 5 seconds, stops for a short time then continues on at a speed of 8 m/s for 4 seconds. How long was the runner stopped for if his average speed at the end of the trip is 4 m/s.
*February 22, 2011 by mikey*

**physics**

A 3800 kg car travels around an unbanked corner at the recommended speed of 65 km/hr. the radius of curvature is 80 m. a) what is the force that the road exerts on the car to keep it in motion around the corner? b) what force would the road need to exert if the car was ...
*September 19, 2012 by Delia*

**physics**

A 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop. (a) What will be the car's stopping distance for dry pavement (µ = 0.85)? (b) What will be the ...
*September 20, 2010 by Tom*

**Algebra**

Two cars start at the same point at Alexandria, verginia, and travel Ans 50mph, 55mph 2 opposite directions. One car travels 5 miles per hour faster than the other car. After 4 hours, the two cars are 420 miles apart. Find the speed of each car.
*March 28, 2013 by Lora*

**Physics**

Car A passes Car B on the highway. Rlative to car A's movement, Car B is moving at a rate of 9 mph backward. If the speed of Car A is 98 mph, what us the speed of Car B?
*March 22, 2013 by Renay*

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